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Finding the Fourth Proportional to 932.93, 1,285.58 and 666.62

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Solution

The fourth proportional to 932.93, 1,285.58 and 666.62 is: 918.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.93 : 1,285.58 = 666.62 : x
  2. Step 2: Convert to fraction form
    932.93/1,285.58 = 666.62/x
  3. Step 3: Cross multiply
    932.93x = 1,285.58 × 666.62
  4. Step 4: Simplify right side
    932.93x = 856,988.58
  5. Step 5: Solve for x
    x = 856,988.58/932.93
  6. Step 6: Final answer
    x = 918.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.