Home / 686,073.60-1,029,110.40-212,806.80

Finding the Fourth Proportional to 686,073.60, 1,029,110.40 and 212,806.80

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Solution

The fourth proportional to 686,073.60, 1,029,110.40 and 212,806.80 is: 319,210.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,073.60 : 1,029,110.40 = 212,806.80 : x
  2. Step 2: Convert to fraction form
    686,073.60/1,029,110.40 = 212,806.80/x
  3. Step 3: Cross multiply
    686,073.60x = 1,029,110.40 × 212,806.80
  4. Step 4: Simplify right side
    686,073.60x = 219,001,691,070.72
  5. Step 5: Solve for x
    x = 219,001,691,070.72/686,073.60
  6. Step 6: Final answer
    x = 319,210.20

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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.