Home / 1,661.24-2,492.90-931.28

Finding the Fourth Proportional to 1,661.24, 2,492.90 and 931.28

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Solution

The fourth proportional to 1,661.24, 2,492.90 and 931.28 is: 1,397.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,661.24 : 2,492.90 = 931.28 : x
  2. Step 2: Convert to fraction form
    1,661.24/2,492.90 = 931.28/x
  3. Step 3: Cross multiply
    1,661.24x = 2,492.90 × 931.28
  4. Step 4: Simplify right side
    1,661.24x = 2,321,587.91
  5. Step 5: Solve for x
    x = 2,321,587.91/1,661.24
  6. Step 6: Final answer
    x = 1,397.50

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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.