Home / 1,290,391.76-1,780,934.40-929,011.76

Finding the Fourth Proportional to 1,290,391.76, 1,780,934.40 and 929,011.76

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Solution

The fourth proportional to 1,290,391.76, 1,780,934.40 and 929,011.76 is: 1,282,175.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,391.76 : 1,780,934.40 = 929,011.76 : x
  2. Step 2: Convert to fraction form
    1,290,391.76/1,780,934.40 = 929,011.76/x
  3. Step 3: Cross multiply
    1,290,391.76x = 1,780,934.40 × 929,011.76
  4. Step 4: Simplify right side
    1,290,391.76x = 1,654,509,001,388.54
  5. Step 5: Solve for x
    x = 1,654,509,001,388.54/1,290,391.76
  6. Step 6: Final answer
    x = 1,282,175.73

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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.