Home / 1,120,800.30-1,681,200.45-987,830.70

Finding the Fourth Proportional to 1,120,800.30, 1,681,200.45 and 987,830.70

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Solution

The fourth proportional to 1,120,800.30, 1,681,200.45 and 987,830.70 is: 1,481,746.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120,800.30 : 1,681,200.45 = 987,830.70 : x
  2. Step 2: Convert to fraction form
    1,120,800.30/1,681,200.45 = 987,830.70/x
  3. Step 3: Cross multiply
    1,120,800.30x = 1,681,200.45 × 987,830.70
  4. Step 4: Simplify right side
    1,120,800.30x = 1,660,741,417,363.82
  5. Step 5: Solve for x
    x = 1,660,741,417,363.82/1,120,800.30
  6. Step 6: Final answer
    x = 1,481,746.05

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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.