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Finding the Fourth Proportional to 1,391.48, 2,087.98 and 600.78

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Solution

The fourth proportional to 1,391.48, 2,087.98 and 600.78 is: 901.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.48 : 2,087.98 = 600.78 : x
  2. Step 2: Convert to fraction form
    1,391.48/2,087.98 = 600.78/x
  3. Step 3: Cross multiply
    1,391.48x = 2,087.98 × 600.78
  4. Step 4: Simplify right side
    1,391.48x = 1,254,416.62
  5. Step 5: Solve for x
    x = 1,254,416.62/1,391.48
  6. Step 6: Final answer
    x = 901.50

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1.5x scale

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.