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Finding the Fourth Proportional to 709.32, 1,063.80 and 478.08

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Solution

The fourth proportional to 709.32, 1,063.80 and 478.08 is: 717.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.32 : 1,063.80 = 478.08 : x
  2. Step 2: Convert to fraction form
    709.32/1,063.80 = 478.08/x
  3. Step 3: Cross multiply
    709.32x = 1,063.80 × 478.08
  4. Step 4: Simplify right side
    709.32x = 508,581.50
  5. Step 5: Solve for x
    x = 508,581.50/709.32
  6. Step 6: Final answer
    x = 717.00

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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.