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Finding the Fourth Proportional to 709.92, 1,064.30 and 555.38

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Solution

The fourth proportional to 709.92, 1,064.30 and 555.38 is: 832.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.92 : 1,064.30 = 555.38 : x
  2. Step 2: Convert to fraction form
    709.92/1,064.30 = 555.38/x
  3. Step 3: Cross multiply
    709.92x = 1,064.30 × 555.38
  4. Step 4: Simplify right side
    709.92x = 591,090.93
  5. Step 5: Solve for x
    x = 591,090.93/709.92
  6. Step 6: Final answer
    x = 832.62

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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.