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Finding the Fourth Proportional to 858.30, 1,184.52 and 718.17

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Solution

The fourth proportional to 858.30, 1,184.52 and 718.17 is: 991.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.30 : 1,184.52 = 718.17 : x
  2. Step 2: Convert to fraction form
    858.30/1,184.52 = 718.17/x
  3. Step 3: Cross multiply
    858.30x = 1,184.52 × 718.17
  4. Step 4: Simplify right side
    858.30x = 850,686.73
  5. Step 5: Solve for x
    x = 850,686.73/858.30
  6. Step 6: Final answer
    x = 991.13

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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.