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Finding the Fourth Proportional to 408,200.10, 612,300.15 and 258,609.30

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Solution

The fourth proportional to 408,200.10, 612,300.15 and 258,609.30 is: 387,913.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,200.10 : 612,300.15 = 258,609.30 : x
  2. Step 2: Convert to fraction form
    408,200.10/612,300.15 = 258,609.30/x
  3. Step 3: Cross multiply
    408,200.10x = 612,300.15 × 258,609.30
  4. Step 4: Simplify right side
    408,200.10x = 158,346,513,181.40
  5. Step 5: Solve for x
    x = 158,346,513,181.40/408,200.10
  6. Step 6: Final answer
    x = 387,913.95

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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.