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Finding the Fourth Proportional to 627,775.20, 941,662.80 and 438,818.40

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Solution

The fourth proportional to 627,775.20, 941,662.80 and 438,818.40 is: 658,227.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,775.20 : 941,662.80 = 438,818.40 : x
  2. Step 2: Convert to fraction form
    627,775.20/941,662.80 = 438,818.40/x
  3. Step 3: Cross multiply
    627,775.20x = 941,662.80 × 438,818.40
  4. Step 4: Simplify right side
    627,775.20x = 413,218,963,235.52
  5. Step 5: Solve for x
    x = 413,218,963,235.52/627,775.20
  6. Step 6: Final answer
    x = 658,227.60

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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.