Home / 1,391,712.23-1,920,530.34-818,789.28

Finding the Fourth Proportional to 1,391,712.23, 1,920,530.34 and 818,789.28

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Solution

The fourth proportional to 1,391,712.23, 1,920,530.34 and 818,789.28 is: 1,129,910.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,712.23 : 1,920,530.34 = 818,789.28 : x
  2. Step 2: Convert to fraction form
    1,391,712.23/1,920,530.34 = 818,789.28/x
  3. Step 3: Cross multiply
    1,391,712.23x = 1,920,530.34 × 818,789.28
  4. Step 4: Simplify right side
    1,391,712.23x = 1,572,509,654,306.76
  5. Step 5: Solve for x
    x = 1,572,509,654,306.76/1,391,712.23
  6. Step 6: Final answer
    x = 1,129,910.07

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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.