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Finding the Fourth Proportional to 527,990.12, 728,631.78 and 286,273.16

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Solution

The fourth proportional to 527,990.12, 728,631.78 and 286,273.16 is: 395,059.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,990.12 : 728,631.78 = 286,273.16 : x
  2. Step 2: Convert to fraction form
    527,990.12/728,631.78 = 286,273.16/x
  3. Step 3: Cross multiply
    527,990.12x = 728,631.78 × 286,273.16
  4. Step 4: Simplify right side
    527,990.12x = 208,587,722,137.03
  5. Step 5: Solve for x
    x = 208,587,722,137.03/527,990.12
  6. Step 6: Final answer
    x = 395,059.90

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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.