Home / 1,489.23-2,055.15-817.05

Finding the Fourth Proportional to 1,489.23, 2,055.15 and 817.05

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Solution

The fourth proportional to 1,489.23, 2,055.15 and 817.05 is: 1,127.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.23 : 2,055.15 = 817.05 : x
  2. Step 2: Convert to fraction form
    1,489.23/2,055.15 = 817.05/x
  3. Step 3: Cross multiply
    1,489.23x = 2,055.15 × 817.05
  4. Step 4: Simplify right side
    1,489.23x = 1,679,160.31
  5. Step 5: Solve for x
    x = 1,679,160.31/1,489.23
  6. Step 6: Final answer
    x = 1,127.54

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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.