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Finding the Fourth Proportional to 826.54, 1,140.55 and 472.39

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Solution

The fourth proportional to 826.54, 1,140.55 and 472.39 is: 651.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.54 : 1,140.55 = 472.39 : x
  2. Step 2: Convert to fraction form
    826.54/1,140.55 = 472.39/x
  3. Step 3: Cross multiply
    826.54x = 1,140.55 × 472.39
  4. Step 4: Simplify right side
    826.54x = 538,784.92
  5. Step 5: Solve for x
    x = 538,784.92/826.54
  6. Step 6: Final answer
    x = 651.86

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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.