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Finding the Fourth Proportional to 840.33, 1,158.59 and 627.71

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Solution

The fourth proportional to 840.33, 1,158.59 and 627.71 is: 865.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.33 : 1,158.59 = 627.71 : x
  2. Step 2: Convert to fraction form
    840.33/1,158.59 = 627.71/x
  3. Step 3: Cross multiply
    840.33x = 1,158.59 × 627.71
  4. Step 4: Simplify right side
    840.33x = 727,254.31
  5. Step 5: Solve for x
    x = 727,254.31/840.33
  6. Step 6: Final answer
    x = 865.44

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Double scale
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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.