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Finding the Fourth Proportional to 208,827.20, 313,046.40 and 145,647.20

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Solution

The fourth proportional to 208,827.20, 313,046.40 and 145,647.20 is: 218,335.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,827.20 : 313,046.40 = 145,647.20 : x
  2. Step 2: Convert to fraction form
    208,827.20/313,046.40 = 145,647.20/x
  3. Step 3: Cross multiply
    208,827.20x = 313,046.40 × 145,647.20
  4. Step 4: Simplify right side
    208,827.20x = 45,594,331,630.08
  5. Step 5: Solve for x
    x = 45,594,331,630.08/208,827.20
  6. Step 6: Final answer
    x = 218,335.22

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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.