Home / 1,505.20-2,074.98-1,239.40

Finding the Fourth Proportional to 1,505.20, 2,074.98 and 1,239.40

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Solution

The fourth proportional to 1,505.20, 2,074.98 and 1,239.40 is: 1,708.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,505.20 : 2,074.98 = 1,239.40 : x
  2. Step 2: Convert to fraction form
    1,505.20/2,074.98 = 1,239.40/x
  3. Step 3: Cross multiply
    1,505.20x = 2,074.98 × 1,239.40
  4. Step 4: Simplify right side
    1,505.20x = 2,571,730.21
  5. Step 5: Solve for x
    x = 2,571,730.21/1,505.20
  6. Step 6: Final answer
    x = 1,708.56

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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.