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Finding the Fourth Proportional to 1,250.32, 1,727.58 and 990.31

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Solution

The fourth proportional to 1,250.32, 1,727.58 and 990.31 is: 1,368.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,250.32 : 1,727.58 = 990.31 : x
  2. Step 2: Convert to fraction form
    1,250.32/1,727.58 = 990.31/x
  3. Step 3: Cross multiply
    1,250.32x = 1,727.58 × 990.31
  4. Step 4: Simplify right side
    1,250.32x = 1,710,839.75
  5. Step 5: Solve for x
    x = 1,710,839.75/1,250.32
  6. Step 6: Final answer
    x = 1,368.32

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1.5x scale

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.