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Finding the Fourth Proportional to 1,011.18, 1,516.74 and 491.22

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Solution

The fourth proportional to 1,011.18, 1,516.74 and 491.22 is: 736.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.18 : 1,516.74 = 491.22 : x
  2. Step 2: Convert to fraction form
    1,011.18/1,516.74 = 491.22/x
  3. Step 3: Cross multiply
    1,011.18x = 1,516.74 × 491.22
  4. Step 4: Simplify right side
    1,011.18x = 745,053.02
  5. Step 5: Solve for x
    x = 745,053.02/1,011.18
  6. Step 6: Final answer
    x = 736.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.