Home / 1,145.16-1,580.33-621.19

Finding the Fourth Proportional to 1,145.16, 1,580.33 and 621.19

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Solution

The fourth proportional to 1,145.16, 1,580.33 and 621.19 is: 857.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.16 : 1,580.33 = 621.19 : x
  2. Step 2: Convert to fraction form
    1,145.16/1,580.33 = 621.19/x
  3. Step 3: Cross multiply
    1,145.16x = 1,580.33 × 621.19
  4. Step 4: Simplify right side
    1,145.16x = 981,685.19
  5. Step 5: Solve for x
    x = 981,685.19/1,145.16
  6. Step 6: Final answer
    x = 857.25

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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.