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Finding the Fourth Proportional to 713.68, 1,070.68 and 553.36

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Solution

The fourth proportional to 713.68, 1,070.68 and 553.36 is: 830.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.68 : 1,070.68 = 553.36 : x
  2. Step 2: Convert to fraction form
    713.68/1,070.68 = 553.36/x
  3. Step 3: Cross multiply
    713.68x = 1,070.68 × 553.36
  4. Step 4: Simplify right side
    713.68x = 592,471.48
  5. Step 5: Solve for x
    x = 592,471.48/713.68
  6. Step 6: Final answer
    x = 830.16

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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.