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Finding the Fourth Proportional to 426,232.80, 640,040.40 and 308,728.80

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Solution

The fourth proportional to 426,232.80, 640,040.40 and 308,728.80 is: 463,593.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,232.80 : 640,040.40 = 308,728.80 : x
  2. Step 2: Convert to fraction form
    426,232.80/640,040.40 = 308,728.80/x
  3. Step 3: Cross multiply
    426,232.80x = 640,040.40 × 308,728.80
  4. Step 4: Simplify right side
    426,232.80x = 197,598,904,643.52
  5. Step 5: Solve for x
    x = 197,598,904,643.52/426,232.80
  6. Step 6: Final answer
    x = 463,593.85

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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.