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Finding the Fourth Proportional to 753.71, 1,128.51 and 570.59

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Solution

The fourth proportional to 753.71, 1,128.51 and 570.59 is: 854.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.71 : 1,128.51 = 570.59 : x
  2. Step 2: Convert to fraction form
    753.71/1,128.51 = 570.59/x
  3. Step 3: Cross multiply
    753.71x = 1,128.51 × 570.59
  4. Step 4: Simplify right side
    753.71x = 643,910.88
  5. Step 5: Solve for x
    x = 643,910.88/753.71
  6. Step 6: Final answer
    x = 854.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.