Home / 1,400,000.80-2,100,001.20-865,789.60

Finding the Fourth Proportional to 1,400,000.80, 2,100,001.20 and 865,789.60

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Solution

The fourth proportional to 1,400,000.80, 2,100,001.20 and 865,789.60 is: 1,298,684.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400,000.80 : 2,100,001.20 = 865,789.60 : x
  2. Step 2: Convert to fraction form
    1,400,000.80/2,100,001.20 = 865,789.60/x
  3. Step 3: Cross multiply
    1,400,000.80x = 2,100,001.20 × 865,789.60
  4. Step 4: Simplify right side
    1,400,000.80x = 1,818,159,198,947.52
  5. Step 5: Solve for x
    x = 1,818,159,198,947.52/1,400,000.80
  6. Step 6: Final answer
    x = 1,298,684.40

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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.