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Finding the Fourth Proportional to 715.00, 1,071.02 and 655.20

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Solution

The fourth proportional to 715.00, 1,071.02 and 655.20 is: 981.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.00 : 1,071.02 = 655.20 : x
  2. Step 2: Convert to fraction form
    715.00/1,071.02 = 655.20/x
  3. Step 3: Cross multiply
    715.00x = 1,071.02 × 655.20
  4. Step 4: Simplify right side
    715.00x = 701,728.67
  5. Step 5: Solve for x
    x = 701,728.67/715.00
  6. Step 6: Final answer
    x = 981.44

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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.