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Finding the Fourth Proportional to 753.42, 1,128.06 and 637.23

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Solution

The fourth proportional to 753.42, 1,128.06 and 637.23 is: 954.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.42 : 1,128.06 = 637.23 : x
  2. Step 2: Convert to fraction form
    753.42/1,128.06 = 637.23/x
  3. Step 3: Cross multiply
    753.42x = 1,128.06 × 637.23
  4. Step 4: Simplify right side
    753.42x = 718,833.67
  5. Step 5: Solve for x
    x = 718,833.67/753.42
  6. Step 6: Final answer
    x = 954.09

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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.