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Finding the Fourth Proportional to 755.71, 1,042.79 and 440.87

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Solution

The fourth proportional to 755.71, 1,042.79 and 440.87 is: 608.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.71 : 1,042.79 = 440.87 : x
  2. Step 2: Convert to fraction form
    755.71/1,042.79 = 440.87/x
  3. Step 3: Cross multiply
    755.71x = 1,042.79 × 440.87
  4. Step 4: Simplify right side
    755.71x = 459,734.83
  5. Step 5: Solve for x
    x = 459,734.83/755.71
  6. Step 6: Final answer
    x = 608.35

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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.