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Finding the Fourth Proportional to 323,397.12, 484,876.32 and 112,920

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Solution

The fourth proportional to 323,397.12, 484,876.32 and 112,920 is: 169,303.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,397.12 : 484,876.32 = 112,920 : x
  2. Step 2: Convert to fraction form
    323,397.12/484,876.32 = 112,920/x
  3. Step 3: Cross multiply
    323,397.12x = 484,876.32 × 112,920
  4. Step 4: Simplify right side
    323,397.12x = 54,752,234,054.40
  5. Step 5: Solve for x
    x = 54,752,234,054.40/323,397.12
  6. Step 6: Final answer
    x = 169,303.41

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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.