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Finding the Fourth Proportional to 711.90, 1,066.77 and 454.86

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Solution

The fourth proportional to 711.90, 1,066.77 and 454.86 is: 681.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.90 : 1,066.77 = 454.86 : x
  2. Step 2: Convert to fraction form
    711.90/1,066.77 = 454.86/x
  3. Step 3: Cross multiply
    711.90x = 1,066.77 × 454.86
  4. Step 4: Simplify right side
    711.90x = 485,231.00
  5. Step 5: Solve for x
    x = 485,231.00/711.90
  6. Step 6: Final answer
    x = 681.60

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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.