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Finding the Fourth Proportional to 742.98, 1,106.02 and 707.60

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Solution

The fourth proportional to 742.98, 1,106.02 and 707.60 is: 1,053.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.98 : 1,106.02 = 707.60 : x
  2. Step 2: Convert to fraction form
    742.98/1,106.02 = 707.60/x
  3. Step 3: Cross multiply
    742.98x = 1,106.02 × 707.60
  4. Step 4: Simplify right side
    742.98x = 782,619.75
  5. Step 5: Solve for x
    x = 782,619.75/742.98
  6. Step 6: Final answer
    x = 1,053.35

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.