Home / 869,721.90-1,200,213.92-487,756.88

Finding the Fourth Proportional to 869,721.90, 1,200,213.92 and 487,756.88

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Solution

The fourth proportional to 869,721.90, 1,200,213.92 and 487,756.88 is: 673,103.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,721.90 : 1,200,213.92 = 487,756.88 : x
  2. Step 2: Convert to fraction form
    869,721.90/1,200,213.92 = 487,756.88/x
  3. Step 3: Cross multiply
    869,721.90x = 1,200,213.92 × 487,756.88
  4. Step 4: Simplify right side
    869,721.90x = 585,412,596,951.77
  5. Step 5: Solve for x
    x = 585,412,596,951.77/869,721.90
  6. Step 6: Final answer
    x = 673,103.20

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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.