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Finding the Fourth Proportional to 747.96, 1,032.32 and 623.42

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Solution

The fourth proportional to 747.96, 1,032.32 and 623.42 is: 860.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.96 : 1,032.32 = 623.42 : x
  2. Step 2: Convert to fraction form
    747.96/1,032.32 = 623.42/x
  3. Step 3: Cross multiply
    747.96x = 1,032.32 × 623.42
  4. Step 4: Simplify right side
    747.96x = 643,568.93
  5. Step 5: Solve for x
    x = 643,568.93/747.96
  6. Step 6: Final answer
    x = 860.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.