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Finding the Fourth Proportional to 851.96, 1,174.95 and 615.84

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Solution

The fourth proportional to 851.96, 1,174.95 and 615.84 is: 849.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.96 : 1,174.95 = 615.84 : x
  2. Step 2: Convert to fraction form
    851.96/1,174.95 = 615.84/x
  3. Step 3: Cross multiply
    851.96x = 1,174.95 × 615.84
  4. Step 4: Simplify right side
    851.96x = 723,581.21
  5. Step 5: Solve for x
    x = 723,581.21/851.96
  6. Step 6: Final answer
    x = 849.32

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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.