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Finding the Fourth Proportional to 715.81, 1,071.69 and 560.29

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Solution

The fourth proportional to 715.81, 1,071.69 and 560.29 is: 838.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.81 : 1,071.69 = 560.29 : x
  2. Step 2: Convert to fraction form
    715.81/1,071.69 = 560.29/x
  3. Step 3: Cross multiply
    715.81x = 1,071.69 × 560.29
  4. Step 4: Simplify right side
    715.81x = 600,457.19
  5. Step 5: Solve for x
    x = 600,457.19/715.81
  6. Step 6: Final answer
    x = 838.85

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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.