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Finding the Fourth Proportional to 851.24, 1,174.00 and 718.77

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Solution

The fourth proportional to 851.24, 1,174.00 and 718.77 is: 991.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.24 : 1,174.00 = 718.77 : x
  2. Step 2: Convert to fraction form
    851.24/1,174.00 = 718.77/x
  3. Step 3: Cross multiply
    851.24x = 1,174.00 × 718.77
  4. Step 4: Simplify right side
    851.24x = 843,832.05
  5. Step 5: Solve for x
    x = 843,832.05/851.24
  6. Step 6: Final answer
    x = 991.30

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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.