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Finding the Fourth Proportional to 896.68, 1,345.12 and 434.71

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Solution

The fourth proportional to 896.68, 1,345.12 and 434.71 is: 652.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.68 : 1,345.12 = 434.71 : x
  2. Step 2: Convert to fraction form
    896.68/1,345.12 = 434.71/x
  3. Step 3: Cross multiply
    896.68x = 1,345.12 × 434.71
  4. Step 4: Simplify right side
    896.68x = 584,740.16
  5. Step 5: Solve for x
    x = 584,740.16/896.68
  6. Step 6: Final answer
    x = 652.12

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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.