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Finding the Fourth Proportional to 710.47, 1,060.73 and 669.01

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Solution

The fourth proportional to 710.47, 1,060.73 and 669.01 is: 998.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.47 : 1,060.73 = 669.01 : x
  2. Step 2: Convert to fraction form
    710.47/1,060.73 = 669.01/x
  3. Step 3: Cross multiply
    710.47x = 1,060.73 × 669.01
  4. Step 4: Simplify right side
    710.47x = 709,640.30
  5. Step 5: Solve for x
    x = 709,640.30/710.47
  6. Step 6: Final answer
    x = 998.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.