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Finding the Fourth Proportional to 319,387.20, 478,562.40 and 200,846.40

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Solution

The fourth proportional to 319,387.20, 478,562.40 and 200,846.40 is: 300,943.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,387.20 : 478,562.40 = 200,846.40 : x
  2. Step 2: Convert to fraction form
    319,387.20/478,562.40 = 200,846.40/x
  3. Step 3: Cross multiply
    319,387.20x = 478,562.40 × 200,846.40
  4. Step 4: Simplify right side
    319,387.20x = 96,117,535,215.36
  5. Step 5: Solve for x
    x = 96,117,535,215.36/319,387.20
  6. Step 6: Final answer
    x = 300,943.60

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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.