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Finding the Fourth Proportional to 712.32, 1,065.65 and 506.99

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Solution

The fourth proportional to 712.32, 1,065.65 and 506.99 is: 758.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.32 : 1,065.65 = 506.99 : x
  2. Step 2: Convert to fraction form
    712.32/1,065.65 = 506.99/x
  3. Step 3: Cross multiply
    712.32x = 1,065.65 × 506.99
  4. Step 4: Simplify right side
    712.32x = 540,266.03
  5. Step 5: Solve for x
    x = 540,266.03/712.32
  6. Step 6: Final answer
    x = 758.46

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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.