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Finding the Fourth Proportional to 1,710.64, 2,565.87 and 478.12

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Solution

The fourth proportional to 1,710.64, 2,565.87 and 478.12 is: 717.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,710.64 : 2,565.87 = 478.12 : x
  2. Step 2: Convert to fraction form
    1,710.64/2,565.87 = 478.12/x
  3. Step 3: Cross multiply
    1,710.64x = 2,565.87 × 478.12
  4. Step 4: Simplify right side
    1,710.64x = 1,226,793.76
  5. Step 5: Solve for x
    x = 1,226,793.76/1,710.64
  6. Step 6: Final answer
    x = 717.15

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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.