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Finding the Fourth Proportional to 666.16, 999.84 and 557.15

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Solution

The fourth proportional to 666.16, 999.84 and 557.15 is: 836.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.16 : 999.84 = 557.15 : x
  2. Step 2: Convert to fraction form
    666.16/999.84 = 557.15/x
  3. Step 3: Cross multiply
    666.16x = 999.84 × 557.15
  4. Step 4: Simplify right side
    666.16x = 557,060.86
  5. Step 5: Solve for x
    x = 557,060.86/666.16
  6. Step 6: Final answer
    x = 836.23

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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.