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Finding the Fourth Proportional to 398,907.20, 598,360.80 and 304,428.80

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Solution

The fourth proportional to 398,907.20, 598,360.80 and 304,428.80 is: 456,643.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,907.20 : 598,360.80 = 304,428.80 : x
  2. Step 2: Convert to fraction form
    398,907.20/598,360.80 = 304,428.80/x
  3. Step 3: Cross multiply
    398,907.20x = 598,360.80 × 304,428.80
  4. Step 4: Simplify right side
    398,907.20x = 182,158,260,311.04
  5. Step 5: Solve for x
    x = 182,158,260,311.04/398,907.20
  6. Step 6: Final answer
    x = 456,643.20

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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.