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Finding the Fourth Proportional to 841.24, 1,160.18 and 645.16

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Solution

The fourth proportional to 841.24, 1,160.18 and 645.16 is: 889.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.24 : 1,160.18 = 645.16 : x
  2. Step 2: Convert to fraction form
    841.24/1,160.18 = 645.16/x
  3. Step 3: Cross multiply
    841.24x = 1,160.18 × 645.16
  4. Step 4: Simplify right side
    841.24x = 748,501.73
  5. Step 5: Solve for x
    x = 748,501.73/841.24
  6. Step 6: Final answer
    x = 889.76

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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.