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Finding the Fourth Proportional to 615,295.20, 921,949.20 and 348,261.60

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Solution

The fourth proportional to 615,295.20, 921,949.20 and 348,261.60 is: 521,830.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,295.20 : 921,949.20 = 348,261.60 : x
  2. Step 2: Convert to fraction form
    615,295.20/921,949.20 = 348,261.60/x
  3. Step 3: Cross multiply
    615,295.20x = 921,949.20 × 348,261.60
  4. Step 4: Simplify right side
    615,295.20x = 321,079,503,510.72
  5. Step 5: Solve for x
    x = 321,079,503,510.72/615,295.20
  6. Step 6: Final answer
    x = 521,830.02

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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.