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Finding the Fourth Proportional to 633,521.52, 873,928.26 and 391,726.80

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Solution

The fourth proportional to 633,521.52, 873,928.26 and 391,726.80 is: 540,378.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,521.52 : 873,928.26 = 391,726.80 : x
  2. Step 2: Convert to fraction form
    633,521.52/873,928.26 = 391,726.80/x
  3. Step 3: Cross multiply
    633,521.52x = 873,928.26 × 391,726.80
  4. Step 4: Simplify right side
    633,521.52x = 342,341,120,719.37
  5. Step 5: Solve for x
    x = 342,341,120,719.37/633,521.52
  6. Step 6: Final answer
    x = 540,378.05

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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.