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Finding the Fourth Proportional to 709.33, 1,063.99 and 486.74

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Solution

The fourth proportional to 709.33, 1,063.99 and 486.74 is: 730.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.33 : 1,063.99 = 486.74 : x
  2. Step 2: Convert to fraction form
    709.33/1,063.99 = 486.74/x
  3. Step 3: Cross multiply
    709.33x = 1,063.99 × 486.74
  4. Step 4: Simplify right side
    709.33x = 517,886.49
  5. Step 5: Solve for x
    x = 517,886.49/709.33
  6. Step 6: Final answer
    x = 730.11

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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.