Home / 698,919.40-1,048,379.10-418,292.20

Finding the Fourth Proportional to 698,919.40, 1,048,379.10 and 418,292.20

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Solution

The fourth proportional to 698,919.40, 1,048,379.10 and 418,292.20 is: 627,438.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,919.40 : 1,048,379.10 = 418,292.20 : x
  2. Step 2: Convert to fraction form
    698,919.40/1,048,379.10 = 418,292.20/x
  3. Step 3: Cross multiply
    698,919.40x = 1,048,379.10 × 418,292.20
  4. Step 4: Simplify right side
    698,919.40x = 438,528,800,173.02
  5. Step 5: Solve for x
    x = 438,528,800,173.02/698,919.40
  6. Step 6: Final answer
    x = 627,438.30

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Double scale
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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.