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Finding the Fourth Proportional to 753.63, 1,040.43 and 587.49

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Solution

The fourth proportional to 753.63, 1,040.43 and 587.49 is: 811.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.63 : 1,040.43 = 587.49 : x
  2. Step 2: Convert to fraction form
    753.63/1,040.43 = 587.49/x
  3. Step 3: Cross multiply
    753.63x = 1,040.43 × 587.49
  4. Step 4: Simplify right side
    753.63x = 611,242.22
  5. Step 5: Solve for x
    x = 611,242.22/753.63
  6. Step 6: Final answer
    x = 811.06

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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.