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Finding the Fourth Proportional to 1,105.46, 1,526.46 and 707.36

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Solution

The fourth proportional to 1,105.46, 1,526.46 and 707.36 is: 976.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105.46 : 1,526.46 = 707.36 : x
  2. Step 2: Convert to fraction form
    1,105.46/1,526.46 = 707.36/x
  3. Step 3: Cross multiply
    1,105.46x = 1,526.46 × 707.36
  4. Step 4: Simplify right side
    1,105.46x = 1,079,751.75
  5. Step 5: Solve for x
    x = 1,079,751.75/1,105.46
  6. Step 6: Final answer
    x = 976.74

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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.