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Finding the Fourth Proportional to 438,684.19, 656,126.67 and 258,339.73

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Solution

The fourth proportional to 438,684.19, 656,126.67 and 258,339.73 is: 386,390.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,684.19 : 656,126.67 = 258,339.73 : x
  2. Step 2: Convert to fraction form
    438,684.19/656,126.67 = 258,339.73/x
  3. Step 3: Cross multiply
    438,684.19x = 656,126.67 × 258,339.73
  4. Step 4: Simplify right side
    438,684.19x = 169,503,582,747.81
  5. Step 5: Solve for x
    x = 169,503,582,747.81/438,684.19
  6. Step 6: Final answer
    x = 386,390.91

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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.