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Finding the Fourth Proportional to 1,172.76, 1,618.68 and 700.92

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Solution

The fourth proportional to 1,172.76, 1,618.68 and 700.92 is: 967.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,172.76 : 1,618.68 = 700.92 : x
  2. Step 2: Convert to fraction form
    1,172.76/1,618.68 = 700.92/x
  3. Step 3: Cross multiply
    1,172.76x = 1,618.68 × 700.92
  4. Step 4: Simplify right side
    1,172.76x = 1,134,565.19
  5. Step 5: Solve for x
    x = 1,134,565.19/1,172.76
  6. Step 6: Final answer
    x = 967.43

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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.