Home / 1,617.19-2,231.65-953.90

Finding the Fourth Proportional to 1,617.19, 2,231.65 and 953.90

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Solution

The fourth proportional to 1,617.19, 2,231.65 and 953.90 is: 1,316.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,617.19 : 2,231.65 = 953.90 : x
  2. Step 2: Convert to fraction form
    1,617.19/2,231.65 = 953.90/x
  3. Step 3: Cross multiply
    1,617.19x = 2,231.65 × 953.90
  4. Step 4: Simplify right side
    1,617.19x = 2,128,762.97
  5. Step 5: Solve for x
    x = 2,128,762.97/1,617.19
  6. Step 6: Final answer
    x = 1,316.34

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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.