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Finding the Fourth Proportional to 413,094.40, 619,641.60 and 388,211.20

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Solution

The fourth proportional to 413,094.40, 619,641.60 and 388,211.20 is: 582,316.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,094.40 : 619,641.60 = 388,211.20 : x
  2. Step 2: Convert to fraction form
    413,094.40/619,641.60 = 388,211.20/x
  3. Step 3: Cross multiply
    413,094.40x = 619,641.60 × 388,211.20
  4. Step 4: Simplify right side
    413,094.40x = 240,551,809,105.92
  5. Step 5: Solve for x
    x = 240,551,809,105.92/413,094.40
  6. Step 6: Final answer
    x = 582,316.80

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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.