Home / 487,888.22-672,973.34-391,323.78

Finding the Fourth Proportional to 487,888.22, 672,973.34 and 391,323.78

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Solution

The fourth proportional to 487,888.22, 672,973.34 and 391,323.78 is: 539,776.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,888.22 : 672,973.34 = 391,323.78 : x
  2. Step 2: Convert to fraction form
    487,888.22/672,973.34 = 391,323.78/x
  3. Step 3: Cross multiply
    487,888.22x = 672,973.34 × 391,323.78
  4. Step 4: Simplify right side
    487,888.22x = 263,350,469,291.41
  5. Step 5: Solve for x
    x = 263,350,469,291.41/487,888.22
  6. Step 6: Final answer
    x = 539,776.24

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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.