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Finding the Fourth Proportional to 408,429.22, 611,389.80 and 369,938.02

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Solution

The fourth proportional to 408,429.22, 611,389.80 and 369,938.02 is: 553,771.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,429.22 : 611,389.80 = 369,938.02 : x
  2. Step 2: Convert to fraction form
    408,429.22/611,389.80 = 369,938.02/x
  3. Step 3: Cross multiply
    408,429.22x = 611,389.80 × 369,938.02
  4. Step 4: Simplify right side
    408,429.22x = 226,176,332,060.20
  5. Step 5: Solve for x
    x = 226,176,332,060.20/408,429.22
  6. Step 6: Final answer
    x = 553,771.18

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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.