Home / 1,687.32-2,532.47-1,319.45

Finding the Fourth Proportional to 1,687.32, 2,532.47 and 1,319.45

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Solution

The fourth proportional to 1,687.32, 2,532.47 and 1,319.45 is: 1,980.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.32 : 2,532.47 = 1,319.45 : x
  2. Step 2: Convert to fraction form
    1,687.32/2,532.47 = 1,319.45/x
  3. Step 3: Cross multiply
    1,687.32x = 2,532.47 × 1,319.45
  4. Step 4: Simplify right side
    1,687.32x = 3,341,448.28
  5. Step 5: Solve for x
    x = 3,341,448.28/1,687.32
  6. Step 6: Final answer
    x = 1,980.33

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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.