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Finding the Fourth Proportional to 711.46, 1,066.68 and 403.53

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Solution

The fourth proportional to 711.46, 1,066.68 and 403.53 is: 605.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.46 : 1,066.68 = 403.53 : x
  2. Step 2: Convert to fraction form
    711.46/1,066.68 = 403.53/x
  3. Step 3: Cross multiply
    711.46x = 1,066.68 × 403.53
  4. Step 4: Simplify right side
    711.46x = 430,432.33
  5. Step 5: Solve for x
    x = 430,432.33/711.46
  6. Step 6: Final answer
    x = 605.00

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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.