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Finding the Fourth Proportional to 753.63, 1,039.48 and 653.87

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Solution

The fourth proportional to 753.63, 1,039.48 and 653.87 is: 901.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.63 : 1,039.48 = 653.87 : x
  2. Step 2: Convert to fraction form
    753.63/1,039.48 = 653.87/x
  3. Step 3: Cross multiply
    753.63x = 1,039.48 × 653.87
  4. Step 4: Simplify right side
    753.63x = 679,684.79
  5. Step 5: Solve for x
    x = 679,684.79/753.63
  6. Step 6: Final answer
    x = 901.88

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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.