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Finding the Fourth Proportional to 372,378.51, 513,867.20 and 211,230.10

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Solution

The fourth proportional to 372,378.51, 513,867.20 and 211,230.10 is: 291,488.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,378.51 : 513,867.20 = 211,230.10 : x
  2. Step 2: Convert to fraction form
    372,378.51/513,867.20 = 211,230.10/x
  3. Step 3: Cross multiply
    372,378.51x = 513,867.20 × 211,230.10
  4. Step 4: Simplify right side
    372,378.51x = 108,544,220,042.72
  5. Step 5: Solve for x
    x = 108,544,220,042.72/372,378.51
  6. Step 6: Final answer
    x = 291,488.95

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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.