Home / 717,539.31-990,211.59-395,257.50

Finding the Fourth Proportional to 717,539.31, 990,211.59 and 395,257.50

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Solution

The fourth proportional to 717,539.31, 990,211.59 and 395,257.50 is: 545,459.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,539.31 : 990,211.59 = 395,257.50 : x
  2. Step 2: Convert to fraction form
    717,539.31/990,211.59 = 395,257.50/x
  3. Step 3: Cross multiply
    717,539.31x = 990,211.59 × 395,257.50
  4. Step 4: Simplify right side
    717,539.31x = 391,388,557,534.43
  5. Step 5: Solve for x
    x = 391,388,557,534.43/717,539.31
  6. Step 6: Final answer
    x = 545,459.39

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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.