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Finding the Fourth Proportional to 527,990.10, 728,726.80 and 313,248.57

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Solution

The fourth proportional to 527,990.10, 728,726.80 and 313,248.57 is: 432,342.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,990.10 : 728,726.80 = 313,248.57 : x
  2. Step 2: Convert to fraction form
    527,990.10/728,726.80 = 313,248.57/x
  3. Step 3: Cross multiply
    527,990.10x = 728,726.80 × 313,248.57
  4. Step 4: Simplify right side
    527,990.10x = 228,272,631,144.96
  5. Step 5: Solve for x
    x = 228,272,631,144.96/527,990.10
  6. Step 6: Final answer
    x = 432,342.63

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1.5x scale

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.