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Finding the Fourth Proportional to 527,695.78, 728,220.78 and 285,978.34

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Solution

The fourth proportional to 527,695.78, 728,220.78 and 285,978.34 is: 394,650.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,695.78 : 728,220.78 = 285,978.34 : x
  2. Step 2: Convert to fraction form
    527,695.78/728,220.78 = 285,978.34/x
  3. Step 3: Cross multiply
    527,695.78x = 728,220.78 × 285,978.34
  4. Step 4: Simplify right side
    527,695.78x = 208,255,366,176.80
  5. Step 5: Solve for x
    x = 208,255,366,176.80/527,695.78
  6. Step 6: Final answer
    x = 394,650.43

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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.