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Finding the Fourth Proportional to 408,988.60, 613,482.90 and 343,670.20

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Solution

The fourth proportional to 408,988.60, 613,482.90 and 343,670.20 is: 515,505.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,988.60 : 613,482.90 = 343,670.20 : x
  2. Step 2: Convert to fraction form
    408,988.60/613,482.90 = 343,670.20/x
  3. Step 3: Cross multiply
    408,988.60x = 613,482.90 × 343,670.20
  4. Step 4: Simplify right side
    408,988.60x = 210,835,790,939.58
  5. Step 5: Solve for x
    x = 210,835,790,939.58/408,988.60
  6. Step 6: Final answer
    x = 515,505.30

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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.