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Finding the Fourth Proportional to 840.47, 1,159.82 and 467.44

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Solution

The fourth proportional to 840.47, 1,159.82 and 467.44 is: 645.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.47 : 1,159.82 = 467.44 : x
  2. Step 2: Convert to fraction form
    840.47/1,159.82 = 467.44/x
  3. Step 3: Cross multiply
    840.47x = 1,159.82 × 467.44
  4. Step 4: Simplify right side
    840.47x = 542,146.26
  5. Step 5: Solve for x
    x = 542,146.26/840.47
  6. Step 6: Final answer
    x = 645.05

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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.