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Finding the Fourth Proportional to 425,309.80, 637,964.70 and 388,568.20

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Solution

The fourth proportional to 425,309.80, 637,964.70 and 388,568.20 is: 582,852.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,309.80 : 637,964.70 = 388,568.20 : x
  2. Step 2: Convert to fraction form
    425,309.80/637,964.70 = 388,568.20/x
  3. Step 3: Cross multiply
    425,309.80x = 637,964.70 × 388,568.20
  4. Step 4: Simplify right side
    425,309.80x = 247,892,795,142.54
  5. Step 5: Solve for x
    x = 247,892,795,142.54/425,309.80
  6. Step 6: Final answer
    x = 582,852.30

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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.