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Finding the Fourth Proportional to 717,419.98, 990,084.51 and 395,130

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Solution

The fourth proportional to 717,419.98, 990,084.51 and 395,130 is: 545,304.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,419.98 : 990,084.51 = 395,130 : x
  2. Step 2: Convert to fraction form
    717,419.98/990,084.51 = 395,130/x
  3. Step 3: Cross multiply
    717,419.98x = 990,084.51 × 395,130
  4. Step 4: Simplify right side
    717,419.98x = 391,212,092,436.30
  5. Step 5: Solve for x
    x = 391,212,092,436.30/717,419.98
  6. Step 6: Final answer
    x = 545,304.15

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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.