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Finding the Fourth Proportional to 715.92, 1,068.12 and 651.12

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Solution

The fourth proportional to 715.92, 1,068.12 and 651.12 is: 971.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.92 : 1,068.12 = 651.12 : x
  2. Step 2: Convert to fraction form
    715.92/1,068.12 = 651.12/x
  3. Step 3: Cross multiply
    715.92x = 1,068.12 × 651.12
  4. Step 4: Simplify right side
    715.92x = 695,474.29
  5. Step 5: Solve for x
    x = 695,474.29/715.92
  6. Step 6: Final answer
    x = 971.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.