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Finding the Fourth Proportional to 1,110.76, 1,532.16 and 718.06

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Solution

The fourth proportional to 1,110.76, 1,532.16 and 718.06 is: 990.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.76 : 1,532.16 = 718.06 : x
  2. Step 2: Convert to fraction form
    1,110.76/1,532.16 = 718.06/x
  3. Step 3: Cross multiply
    1,110.76x = 1,532.16 × 718.06
  4. Step 4: Simplify right side
    1,110.76x = 1,100,182.81
  5. Step 5: Solve for x
    x = 1,100,182.81/1,110.76
  6. Step 6: Final answer
    x = 990.48

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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.