Home / 1,240,139.20-1,860,208.80-814,986.40

Finding the Fourth Proportional to 1,240,139.20, 1,860,208.80 and 814,986.40

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Solution

The fourth proportional to 1,240,139.20, 1,860,208.80 and 814,986.40 is: 1,222,479.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240,139.20 : 1,860,208.80 = 814,986.40 : x
  2. Step 2: Convert to fraction form
    1,240,139.20/1,860,208.80 = 814,986.40/x
  3. Step 3: Cross multiply
    1,240,139.20x = 1,860,208.80 × 814,986.40
  4. Step 4: Simplify right side
    1,240,139.20x = 1,516,044,873,160.32
  5. Step 5: Solve for x
    x = 1,516,044,873,160.32/1,240,139.20
  6. Step 6: Final answer
    x = 1,222,479.60

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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.