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Finding the Fourth Proportional to 983.43, 1,475.55 and 435.24

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Solution

The fourth proportional to 983.43, 1,475.55 and 435.24 is: 653.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.43 : 1,475.55 = 435.24 : x
  2. Step 2: Convert to fraction form
    983.43/1,475.55 = 435.24/x
  3. Step 3: Cross multiply
    983.43x = 1,475.55 × 435.24
  4. Step 4: Simplify right side
    983.43x = 642,218.38
  5. Step 5: Solve for x
    x = 642,218.38/983.43
  6. Step 6: Final answer
    x = 653.04

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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.