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Finding the Fourth Proportional to 519,887.20, 779,830.80 and 317,808.40

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Solution

The fourth proportional to 519,887.20, 779,830.80 and 317,808.40 is: 476,712.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,887.20 : 779,830.80 = 317,808.40 : x
  2. Step 2: Convert to fraction form
    519,887.20/779,830.80 = 317,808.40/x
  3. Step 3: Cross multiply
    519,887.20x = 779,830.80 × 317,808.40
  4. Step 4: Simplify right side
    519,887.20x = 247,836,778,818.72
  5. Step 5: Solve for x
    x = 247,836,778,818.72/519,887.20
  6. Step 6: Final answer
    x = 476,712.60

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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.