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Finding the Fourth Proportional to 1,157.35, 1,736.02 and 670.13

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Solution

The fourth proportional to 1,157.35, 1,736.02 and 670.13 is: 1,005.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157.35 : 1,736.02 = 670.13 : x
  2. Step 2: Convert to fraction form
    1,157.35/1,736.02 = 670.13/x
  3. Step 3: Cross multiply
    1,157.35x = 1,736.02 × 670.13
  4. Step 4: Simplify right side
    1,157.35x = 1,163,359.75
  5. Step 5: Solve for x
    x = 1,163,359.75/1,157.35
  6. Step 6: Final answer
    x = 1,005.20

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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.