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Finding the Fourth Proportional to 538,419.20, 807,628.80 and 484,966.40

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Solution

The fourth proportional to 538,419.20, 807,628.80 and 484,966.40 is: 727,449.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,419.20 : 807,628.80 = 484,966.40 : x
  2. Step 2: Convert to fraction form
    538,419.20/807,628.80 = 484,966.40/x
  3. Step 3: Cross multiply
    538,419.20x = 807,628.80 × 484,966.40
  4. Step 4: Simplify right side
    538,419.20x = 391,672,831,672.32
  5. Step 5: Solve for x
    x = 391,672,831,672.32/538,419.20
  6. Step 6: Final answer
    x = 727,449.60

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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.