Home / 690,720.20-1,036,220.42-217,295.45

Finding the Fourth Proportional to 690,720.20, 1,036,220.42 and 217,295.45

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Solution

The fourth proportional to 690,720.20, 1,036,220.42 and 217,295.45 is: 325,987.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,720.20 : 1,036,220.42 = 217,295.45 : x
  2. Step 2: Convert to fraction form
    690,720.20/1,036,220.42 = 217,295.45/x
  3. Step 3: Cross multiply
    690,720.20x = 1,036,220.42 × 217,295.45
  4. Step 4: Simplify right side
    690,720.20x = 225,165,982,463.09
  5. Step 5: Solve for x
    x = 225,165,982,463.09/690,720.20
  6. Step 6: Final answer
    x = 325,987.26

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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.