Home / 686,531.20-1,029,796.80-213,212.80

Finding the Fourth Proportional to 686,531.20, 1,029,796.80 and 213,212.80

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Solution

The fourth proportional to 686,531.20, 1,029,796.80 and 213,212.80 is: 319,819.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,531.20 : 1,029,796.80 = 213,212.80 : x
  2. Step 2: Convert to fraction form
    686,531.20/1,029,796.80 = 213,212.80/x
  3. Step 3: Cross multiply
    686,531.20x = 1,029,796.80 × 213,212.80
  4. Step 4: Simplify right side
    686,531.20x = 219,565,859,159.04
  5. Step 5: Solve for x
    x = 219,565,859,159.04/686,531.20
  6. Step 6: Final answer
    x = 319,819.20

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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.