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Finding the Fourth Proportional to 666.38, 995.52 and 557.03

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Solution

The fourth proportional to 666.38, 995.52 and 557.03 is: 832.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.38 : 995.52 = 557.03 : x
  2. Step 2: Convert to fraction form
    666.38/995.52 = 557.03/x
  3. Step 3: Cross multiply
    666.38x = 995.52 × 557.03
  4. Step 4: Simplify right side
    666.38x = 554,529.53
  5. Step 5: Solve for x
    x = 554,529.53/666.38
  6. Step 6: Final answer
    x = 832.16

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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.