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Finding the Fourth Proportional to 1,475.91, 2,213.20 and 435.55

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Solution

The fourth proportional to 1,475.91, 2,213.20 and 435.55 is: 653.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,475.91 : 2,213.20 = 435.55 : x
  2. Step 2: Convert to fraction form
    1,475.91/2,213.20 = 435.55/x
  3. Step 3: Cross multiply
    1,475.91x = 2,213.20 × 435.55
  4. Step 4: Simplify right side
    1,475.91x = 963,963.42
  5. Step 5: Solve for x
    x = 963,963.42/1,475.91
  6. Step 6: Final answer
    x = 653.13

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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.