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Finding the Fourth Proportional to 408,870.40, 612,139.20 and 362,214.40

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Solution

The fourth proportional to 408,870.40, 612,139.20 and 362,214.40 is: 542,288.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,870.40 : 612,139.20 = 362,214.40 : x
  2. Step 2: Convert to fraction form
    408,870.40/612,139.20 = 362,214.40/x
  3. Step 3: Cross multiply
    408,870.40x = 612,139.20 × 362,214.40
  4. Step 4: Simplify right side
    408,870.40x = 221,725,633,044.48
  5. Step 5: Solve for x
    x = 221,725,633,044.48/408,870.40
  6. Step 6: Final answer
    x = 542,288.30

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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.