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Finding the Fourth Proportional to 826.64, 1,140.99 and 472.74

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Solution

The fourth proportional to 826.64, 1,140.99 and 472.74 is: 652.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.64 : 1,140.99 = 472.74 : x
  2. Step 2: Convert to fraction form
    826.64/1,140.99 = 472.74/x
  3. Step 3: Cross multiply
    826.64x = 1,140.99 × 472.74
  4. Step 4: Simplify right side
    826.64x = 539,385.56
  5. Step 5: Solve for x
    x = 539,385.56/826.64
  6. Step 6: Final answer
    x = 652.50

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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.