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Finding the Fourth Proportional to 389,378.61, 584,065.27 and 209,548.65

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Solution

The fourth proportional to 389,378.61, 584,065.27 and 209,548.65 is: 314,321.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,378.61 : 584,065.27 = 209,548.65 : x
  2. Step 2: Convert to fraction form
    389,378.61/584,065.27 = 209,548.65/x
  3. Step 3: Cross multiply
    389,378.61x = 584,065.27 × 209,548.65
  4. Step 4: Simplify right side
    389,378.61x = 122,390,088,840.39
  5. Step 5: Solve for x
    x = 122,390,088,840.39/389,378.61
  6. Step 6: Final answer
    x = 314,321.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.