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Finding the Fourth Proportional to 417,963.20, 626,944.80 and 260,110.40

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Solution

The fourth proportional to 417,963.20, 626,944.80 and 260,110.40 is: 390,165.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,963.20 : 626,944.80 = 260,110.40 : x
  2. Step 2: Convert to fraction form
    417,963.20/626,944.80 = 260,110.40/x
  3. Step 3: Cross multiply
    417,963.20x = 626,944.80 × 260,110.40
  4. Step 4: Simplify right side
    417,963.20x = 163,074,862,705.92
  5. Step 5: Solve for x
    x = 163,074,862,705.92/417,963.20
  6. Step 6: Final answer
    x = 390,165.60

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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.