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Finding the Fourth Proportional to 408,397.20, 611,386.20 and 303,680.40

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Solution

The fourth proportional to 408,397.20, 611,386.20 and 303,680.40 is: 454,621.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,397.20 : 611,386.20 = 303,680.40 : x
  2. Step 2: Convert to fraction form
    408,397.20/611,386.20 = 303,680.40/x
  3. Step 3: Cross multiply
    408,397.20x = 611,386.20 × 303,680.40
  4. Step 4: Simplify right side
    408,397.20x = 185,666,005,770.48
  5. Step 5: Solve for x
    x = 185,666,005,770.48/408,397.20
  6. Step 6: Final answer
    x = 454,621.15

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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.