Home / 1,281,686.91-1,767,120.30-821,990.45

Finding the Fourth Proportional to 1,281,686.91, 1,767,120.30 and 821,990.45

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Solution

The fourth proportional to 1,281,686.91, 1,767,120.30 and 821,990.45 is: 1,133,315.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281,686.91 : 1,767,120.30 = 821,990.45 : x
  2. Step 2: Convert to fraction form
    1,281,686.91/1,767,120.30 = 821,990.45/x
  3. Step 3: Cross multiply
    1,281,686.91x = 1,767,120.30 × 821,990.45
  4. Step 4: Simplify right side
    1,281,686.91x = 1,452,556,001,765.53
  5. Step 5: Solve for x
    x = 1,452,556,001,765.53/1,281,686.91
  6. Step 6: Final answer
    x = 1,133,315.78

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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.