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Finding the Fourth Proportional to 340,920.12, 511,400.34 and 104,279.16

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Solution

The fourth proportional to 340,920.12, 511,400.34 and 104,279.16 is: 156,424.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,920.12 : 511,400.34 = 104,279.16 : x
  2. Step 2: Convert to fraction form
    340,920.12/511,400.34 = 104,279.16/x
  3. Step 3: Cross multiply
    340,920.12x = 511,400.34 × 104,279.16
  4. Step 4: Simplify right side
    340,920.12x = 53,328,397,878.91
  5. Step 5: Solve for x
    x = 53,328,397,878.91/340,920.12
  6. Step 6: Final answer
    x = 156,424.91

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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.