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Finding the Fourth Proportional to 1,157.92, 1,598.88 and 908.80

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Solution

The fourth proportional to 1,157.92, 1,598.88 and 908.80 is: 1,254.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157.92 : 1,598.88 = 908.80 : x
  2. Step 2: Convert to fraction form
    1,157.92/1,598.88 = 908.80/x
  3. Step 3: Cross multiply
    1,157.92x = 1,598.88 × 908.80
  4. Step 4: Simplify right side
    1,157.92x = 1,453,062.14
  5. Step 5: Solve for x
    x = 1,453,062.14/1,157.92
  6. Step 6: Final answer
    x = 1,254.89

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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.