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Finding the Fourth Proportional to 638,130.70, 957,196.05 and 319,266.10

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Solution

The fourth proportional to 638,130.70, 957,196.05 and 319,266.10 is: 478,899.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,130.70 : 957,196.05 = 319,266.10 : x
  2. Step 2: Convert to fraction form
    638,130.70/957,196.05 = 319,266.10/x
  3. Step 3: Cross multiply
    638,130.70x = 957,196.05 × 319,266.10
  4. Step 4: Simplify right side
    638,130.70x = 305,600,249,818.91
  5. Step 5: Solve for x
    x = 305,600,249,818.91/638,130.70
  6. Step 6: Final answer
    x = 478,899.15

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Similar ratio
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1.5x scale

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.