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Finding the Fourth Proportional to 1,239.88, 1,700.87 and 1,165.36

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Solution

The fourth proportional to 1,239.88, 1,700.87 and 1,165.36 is: 1,598.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.88 : 1,700.87 = 1,165.36 : x
  2. Step 2: Convert to fraction form
    1,239.88/1,700.87 = 1,165.36/x
  3. Step 3: Cross multiply
    1,239.88x = 1,700.87 × 1,165.36
  4. Step 4: Simplify right side
    1,239.88x = 1,982,125.86
  5. Step 5: Solve for x
    x = 1,982,125.86/1,239.88
  6. Step 6: Final answer
    x = 1,598.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.