Home / 690,720.64-1,036,221.10-217,295.90

Finding the Fourth Proportional to 690,720.64, 1,036,221.10 and 217,295.90

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Solution

The fourth proportional to 690,720.64, 1,036,221.10 and 217,295.90 is: 325,987.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,720.64 : 1,036,221.10 = 217,295.90 : x
  2. Step 2: Convert to fraction form
    690,720.64/1,036,221.10 = 217,295.90/x
  3. Step 3: Cross multiply
    690,720.64x = 1,036,221.10 × 217,295.90
  4. Step 4: Simplify right side
    690,720.64x = 225,166,596,523.49
  5. Step 5: Solve for x
    x = 225,166,596,523.49/690,720.64
  6. Step 6: Final answer
    x = 325,987.94

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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.