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Finding the Fourth Proportional to 615,832.80, 922,874.40 and 428,625.60

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Solution

The fourth proportional to 615,832.80, 922,874.40 and 428,625.60 is: 642,329.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,832.80 : 922,874.40 = 428,625.60 : x
  2. Step 2: Convert to fraction form
    615,832.80/922,874.40 = 428,625.60/x
  3. Step 3: Cross multiply
    615,832.80x = 922,874.40 × 428,625.60
  4. Step 4: Simplify right side
    615,832.80x = 395,567,593,424.64
  5. Step 5: Solve for x
    x = 395,567,593,424.64/615,832.80
  6. Step 6: Final answer
    x = 642,329.53

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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.