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Finding the Fourth Proportional to 717,521, 990,179.02 and 415,889.96

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Solution

The fourth proportional to 717,521, 990,179.02 and 415,889.96 is: 573,928.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,521 : 990,179.02 = 415,889.96 : x
  2. Step 2: Convert to fraction form
    717,521/990,179.02 = 415,889.96/x
  3. Step 3: Cross multiply
    717,521x = 990,179.02 × 415,889.96
  4. Step 4: Simplify right side
    717,521x = 411,805,513,020.64
  5. Step 5: Solve for x
    x = 411,805,513,020.64/717,521
  6. Step 6: Final answer
    x = 573,928.17

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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.