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Finding the Fourth Proportional to 324,005.80, 485,946.06 and 99,311.80

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Solution

The fourth proportional to 324,005.80, 485,946.06 and 99,311.80 is: 148,948.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,005.80 : 485,946.06 = 99,311.80 : x
  2. Step 2: Convert to fraction form
    324,005.80/485,946.06 = 99,311.80/x
  3. Step 3: Cross multiply
    324,005.80x = 485,946.06 × 99,311.80
  4. Step 4: Simplify right side
    324,005.80x = 48,260,177,921.51
  5. Step 5: Solve for x
    x = 48,260,177,921.51/324,005.80
  6. Step 6: Final answer
    x = 148,948.50

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1.5x scale

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.