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Finding the Fourth Proportional to 372,394.71, 513,903.29 and 211,280.85

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Solution

The fourth proportional to 372,394.71, 513,903.29 and 211,280.85 is: 291,566.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,394.71 : 513,903.29 = 211,280.85 : x
  2. Step 2: Convert to fraction form
    372,394.71/513,903.29 = 211,280.85/x
  3. Step 3: Cross multiply
    372,394.71x = 513,903.29 × 211,280.85
  4. Step 4: Simplify right side
    372,394.71x = 108,577,922,872.59
  5. Step 5: Solve for x
    x = 108,577,922,872.59/372,394.71
  6. Step 6: Final answer
    x = 291,566.77

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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.