Home / 690,720.45-1,036,220.80-217,295.70

Finding the Fourth Proportional to 690,720.45, 1,036,220.80 and 217,295.70

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Solution

The fourth proportional to 690,720.45, 1,036,220.80 and 217,295.70 is: 325,987.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,720.45 : 1,036,220.80 = 217,295.70 : x
  2. Step 2: Convert to fraction form
    690,720.45/1,036,220.80 = 217,295.70/x
  3. Step 3: Cross multiply
    690,720.45x = 1,036,220.80 × 217,295.70
  4. Step 4: Simplify right side
    690,720.45x = 225,166,324,090.56
  5. Step 5: Solve for x
    x = 225,166,324,090.56/690,720.45
  6. Step 6: Final answer
    x = 325,987.63

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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.