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Finding the Fourth Proportional to 838.02, 1,155.90 and 641.19

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Solution

The fourth proportional to 838.02, 1,155.90 and 641.19 is: 884.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.02 : 1,155.90 = 641.19 : x
  2. Step 2: Convert to fraction form
    838.02/1,155.90 = 641.19/x
  3. Step 3: Cross multiply
    838.02x = 1,155.90 × 641.19
  4. Step 4: Simplify right side
    838.02x = 741,151.52
  5. Step 5: Solve for x
    x = 741,151.52/838.02
  6. Step 6: Final answer
    x = 884.41

Related Problems

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Half scale
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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.