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Finding the Fourth Proportional to 941.58, 1,412.12 and 666.86

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Solution

The fourth proportional to 941.58, 1,412.12 and 666.86 is: 1,000.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.58 : 1,412.12 = 666.86 : x
  2. Step 2: Convert to fraction form
    941.58/1,412.12 = 666.86/x
  3. Step 3: Cross multiply
    941.58x = 1,412.12 × 666.86
  4. Step 4: Simplify right side
    941.58x = 941,686.34
  5. Step 5: Solve for x
    x = 941,686.34/941.58
  6. Step 6: Final answer
    x = 1,000.11

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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.