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Finding the Fourth Proportional to 755.07, 1,042.56 and 589.02

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Solution

The fourth proportional to 755.07, 1,042.56 and 589.02 is: 813.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.07 : 1,042.56 = 589.02 : x
  2. Step 2: Convert to fraction form
    755.07/1,042.56 = 589.02/x
  3. Step 3: Cross multiply
    755.07x = 1,042.56 × 589.02
  4. Step 4: Simplify right side
    755.07x = 614,088.69
  5. Step 5: Solve for x
    x = 614,088.69/755.07
  6. Step 6: Final answer
    x = 813.29

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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.