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Finding the Fourth Proportional to 324,705.20, 487,134.60 and 103,089.20

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Solution

The fourth proportional to 324,705.20, 487,134.60 and 103,089.20 is: 154,658.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,705.20 : 487,134.60 = 103,089.20 : x
  2. Step 2: Convert to fraction form
    324,705.20/487,134.60 = 103,089.20/x
  3. Step 3: Cross multiply
    324,705.20x = 487,134.60 × 103,089.20
  4. Step 4: Simplify right side
    324,705.20x = 50,218,316,206.32
  5. Step 5: Solve for x
    x = 50,218,316,206.32/324,705.20
  6. Step 6: Final answer
    x = 154,658.18

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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.