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Finding the Fourth Proportional to 1,099.70, 1,517.54 and 657.34

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Solution

The fourth proportional to 1,099.70, 1,517.54 and 657.34 is: 907.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,099.70 : 1,517.54 = 657.34 : x
  2. Step 2: Convert to fraction form
    1,099.70/1,517.54 = 657.34/x
  3. Step 3: Cross multiply
    1,099.70x = 1,517.54 × 657.34
  4. Step 4: Simplify right side
    1,099.70x = 997,539.74
  5. Step 5: Solve for x
    x = 997,539.74/1,099.70
  6. Step 6: Final answer
    x = 907.10

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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.