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Finding the Fourth Proportional to 841.24, 1,158.33 and 642.25

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Solution

The fourth proportional to 841.24, 1,158.33 and 642.25 is: 884.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.24 : 1,158.33 = 642.25 : x
  2. Step 2: Convert to fraction form
    841.24/1,158.33 = 642.25/x
  3. Step 3: Cross multiply
    841.24x = 1,158.33 × 642.25
  4. Step 4: Simplify right side
    841.24x = 743,937.44
  5. Step 5: Solve for x
    x = 743,937.44/841.24
  6. Step 6: Final answer
    x = 884.33

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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.