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Finding the Fourth Proportional to 498,512.30, 747,768.45 and 287,904.20

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Solution

The fourth proportional to 498,512.30, 747,768.45 and 287,904.20 is: 431,856.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,512.30 : 747,768.45 = 287,904.20 : x
  2. Step 2: Convert to fraction form
    498,512.30/747,768.45 = 287,904.20/x
  3. Step 3: Cross multiply
    498,512.30x = 747,768.45 × 287,904.20
  4. Step 4: Simplify right side
    498,512.30x = 215,285,677,382.49
  5. Step 5: Solve for x
    x = 215,285,677,382.49/498,512.30
  6. Step 6: Final answer
    x = 431,856.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.