Home / 638,863,245.40-958,294,868.10-328,926,854.20

Finding the Fourth Proportional to 638,863,245.40, 958,294,868.10 and 328,926,854.20

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Solution

The fourth proportional to 638,863,245.40, 958,294,868.10 and 328,926,854.20 is: 493,390,281.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,863,245.40 : 958,294,868.10 = 328,926,854.20 : x
  2. Step 2: Convert to fraction form
    638,863,245.40/958,294,868.10 = 328,926,854.20/x
  3. Step 3: Cross multiply
    638,863,245.40x = 958,294,868.10 × 328,926,854.20
  4. Step 4: Simplify right side
    638,863,245.40x = 315,208,916,360,136,896
  5. Step 5: Solve for x
    x = 315,208,916,360,136,896/638,863,245.40
  6. Step 6: Final answer
    x = 493,390,281.30

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Double scale
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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.