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Finding the Fourth Proportional to 478,596.56, 660,458.44 and 287,605.20

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Solution

The fourth proportional to 478,596.56, 660,458.44 and 287,605.20 is: 396,892.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,596.56 : 660,458.44 = 287,605.20 : x
  2. Step 2: Convert to fraction form
    478,596.56/660,458.44 = 287,605.20/x
  3. Step 3: Cross multiply
    478,596.56x = 660,458.44 × 287,605.20
  4. Step 4: Simplify right side
    478,596.56x = 189,951,281,727.89
  5. Step 5: Solve for x
    x = 189,951,281,727.89/478,596.56
  6. Step 6: Final answer
    x = 396,892.28

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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.