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Finding the Fourth Proportional to 317,480.80, 475,832.40 and 139,799.20

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Solution

The fourth proportional to 317,480.80, 475,832.40 and 139,799.20 is: 209,527.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,480.80 : 475,832.40 = 139,799.20 : x
  2. Step 2: Convert to fraction form
    317,480.80/475,832.40 = 139,799.20/x
  3. Step 3: Cross multiply
    317,480.80x = 475,832.40 × 139,799.20
  4. Step 4: Simplify right side
    317,480.80x = 66,520,988,854.08
  5. Step 5: Solve for x
    x = 66,520,988,854.08/317,480.80
  6. Step 6: Final answer
    x = 209,527.60

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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.