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Finding the Fourth Proportional to 717,991.35, 990,996.90 and 446,264.46

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Solution

The fourth proportional to 717,991.35, 990,996.90 and 446,264.46 is: 615,949.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,991.35 : 990,996.90 = 446,264.46 : x
  2. Step 2: Convert to fraction form
    717,991.35/990,996.90 = 446,264.46/x
  3. Step 3: Cross multiply
    717,991.35x = 990,996.90 × 446,264.46
  4. Step 4: Simplify right side
    717,991.35x = 442,246,696,440.17
  5. Step 5: Solve for x
    x = 442,246,696,440.17/717,991.35
  6. Step 6: Final answer
    x = 615,949.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.