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Finding the Fourth Proportional to 1,098.69, 1,516.19 and 705.71

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Solution

The fourth proportional to 1,098.69, 1,516.19 and 705.71 is: 973.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.69 : 1,516.19 = 705.71 : x
  2. Step 2: Convert to fraction form
    1,098.69/1,516.19 = 705.71/x
  3. Step 3: Cross multiply
    1,098.69x = 1,516.19 × 705.71
  4. Step 4: Simplify right side
    1,098.69x = 1,069,990.44
  5. Step 5: Solve for x
    x = 1,069,990.44/1,098.69
  6. Step 6: Final answer
    x = 973.88

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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.