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Finding the Fourth Proportional to 408,020.10, 612,030.15 and 308,487.30

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Solution

The fourth proportional to 408,020.10, 612,030.15 and 308,487.30 is: 462,730.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,020.10 : 612,030.15 = 308,487.30 : x
  2. Step 2: Convert to fraction form
    408,020.10/612,030.15 = 308,487.30/x
  3. Step 3: Cross multiply
    408,020.10x = 612,030.15 × 308,487.30
  4. Step 4: Simplify right side
    408,020.10x = 188,803,528,492.10
  5. Step 5: Solve for x
    x = 188,803,528,492.10/408,020.10
  6. Step 6: Final answer
    x = 462,730.95

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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.