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Finding the Fourth Proportional to 720.62, 1,079.29 and 591.02

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Solution

The fourth proportional to 720.62, 1,079.29 and 591.02 is: 885.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.62 : 1,079.29 = 591.02 : x
  2. Step 2: Convert to fraction form
    720.62/1,079.29 = 591.02/x
  3. Step 3: Cross multiply
    720.62x = 1,079.29 × 591.02
  4. Step 4: Simplify right side
    720.62x = 637,881.98
  5. Step 5: Solve for x
    x = 637,881.98/720.62
  6. Step 6: Final answer
    x = 885.18

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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.