Home / 1,290,217.76-1,780,561.28-717,267.50

Finding the Fourth Proportional to 1,290,217.76, 1,780,561.28 and 717,267.50

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Solution

The fourth proportional to 1,290,217.76, 1,780,561.28 and 717,267.50 is: 989,862.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,217.76 : 1,780,561.28 = 717,267.50 : x
  2. Step 2: Convert to fraction form
    1,290,217.76/1,780,561.28 = 717,267.50/x
  3. Step 3: Cross multiply
    1,290,217.76x = 1,780,561.28 × 717,267.50
  4. Step 4: Simplify right side
    1,290,217.76x = 1,277,138,737,902.40
  5. Step 5: Solve for x
    x = 1,277,138,737,902.40/1,290,217.76
  6. Step 6: Final answer
    x = 989,862.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.