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Finding the Fourth Proportional to 408,088.60, 612,132.90 and 405,464.20

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Solution

The fourth proportional to 408,088.60, 612,132.90 and 405,464.20 is: 608,196.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,088.60 : 612,132.90 = 405,464.20 : x
  2. Step 2: Convert to fraction form
    408,088.60/612,132.90 = 405,464.20/x
  3. Step 3: Cross multiply
    408,088.60x = 612,132.90 × 405,464.20
  4. Step 4: Simplify right side
    408,088.60x = 248,197,976,592.18
  5. Step 5: Solve for x
    x = 248,197,976,592.18/408,088.60
  6. Step 6: Final answer
    x = 608,196.30

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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.