Home / 629,904.40-944,856.60-390,209.20

Finding the Fourth Proportional to 629,904.40, 944,856.60 and 390,209.20

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Solution

The fourth proportional to 629,904.40, 944,856.60 and 390,209.20 is: 585,313.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,904.40 : 944,856.60 = 390,209.20 : x
  2. Step 2: Convert to fraction form
    629,904.40/944,856.60 = 390,209.20/x
  3. Step 3: Cross multiply
    629,904.40x = 944,856.60 × 390,209.20
  4. Step 4: Simplify right side
    629,904.40x = 368,691,738,000.72
  5. Step 5: Solve for x
    x = 368,691,738,000.72/629,904.40
  6. Step 6: Final answer
    x = 585,313.80

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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.