Home / 638,456.77-881,077.16-351,987.11

Finding the Fourth Proportional to 638,456.77, 881,077.16 and 351,987.11

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Solution

The fourth proportional to 638,456.77, 881,077.16 and 351,987.11 is: 485,745.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,456.77 : 881,077.16 = 351,987.11 : x
  2. Step 2: Convert to fraction form
    638,456.77/881,077.16 = 351,987.11/x
  3. Step 3: Cross multiply
    638,456.77x = 881,077.16 × 351,987.11
  4. Step 4: Simplify right side
    638,456.77x = 310,127,803,235.41
  5. Step 5: Solve for x
    x = 310,127,803,235.41/638,456.77
  6. Step 6: Final answer
    x = 485,745.97

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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.