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Finding the Fourth Proportional to 553,637.20, 830,456.34 and 154,279.12

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Solution

The fourth proportional to 553,637.20, 830,456.34 and 154,279.12 is: 231,418.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,637.20 : 830,456.34 = 154,279.12 : x
  2. Step 2: Convert to fraction form
    553,637.20/830,456.34 = 154,279.12/x
  3. Step 3: Cross multiply
    553,637.20x = 830,456.34 × 154,279.12
  4. Step 4: Simplify right side
    553,637.20x = 128,122,073,333.62
  5. Step 5: Solve for x
    x = 128,122,073,333.62/553,637.20
  6. Step 6: Final answer
    x = 231,418.83

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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.