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Finding the Fourth Proportional to 837.76, 1,155.54 and 543.19

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Solution

The fourth proportional to 837.76, 1,155.54 and 543.19 is: 749.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.76 : 1,155.54 = 543.19 : x
  2. Step 2: Convert to fraction form
    837.76/1,155.54 = 543.19/x
  3. Step 3: Cross multiply
    837.76x = 1,155.54 × 543.19
  4. Step 4: Simplify right side
    837.76x = 627,677.77
  5. Step 5: Solve for x
    x = 627,677.77/837.76
  6. Step 6: Final answer
    x = 749.23

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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.