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Finding the Fourth Proportional to 872.18, 1,307.44 and 433.16

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Solution

The fourth proportional to 872.18, 1,307.44 and 433.16 is: 649.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.18 : 1,307.44 = 433.16 : x
  2. Step 2: Convert to fraction form
    872.18/1,307.44 = 433.16/x
  3. Step 3: Cross multiply
    872.18x = 1,307.44 × 433.16
  4. Step 4: Simplify right side
    872.18x = 566,330.71
  5. Step 5: Solve for x
    x = 566,330.71/872.18
  6. Step 6: Final answer
    x = 649.33

Related Problems

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Half scale
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Double scale
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1.5x scale

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.