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Finding the Fourth Proportional to 974.15, 1,459.34 and 487.61

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Solution

The fourth proportional to 974.15, 1,459.34 and 487.61 is: 730.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.15 : 1,459.34 = 487.61 : x
  2. Step 2: Convert to fraction form
    974.15/1,459.34 = 487.61/x
  3. Step 3: Cross multiply
    974.15x = 1,459.34 × 487.61
  4. Step 4: Simplify right side
    974.15x = 711,586.34
  5. Step 5: Solve for x
    x = 711,586.34/974.15
  6. Step 6: Final answer
    x = 730.47

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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.