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Finding the Fourth Proportional to 615,121.90, 922,682.85 and 455,689.60

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Solution

The fourth proportional to 615,121.90, 922,682.85 and 455,689.60 is: 683,534.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,121.90 : 922,682.85 = 455,689.60 : x
  2. Step 2: Convert to fraction form
    615,121.90/922,682.85 = 455,689.60/x
  3. Step 3: Cross multiply
    615,121.90x = 922,682.85 × 455,689.60
  4. Step 4: Simplify right side
    615,121.90x = 420,456,978,843.36
  5. Step 5: Solve for x
    x = 420,456,978,843.36/615,121.90
  6. Step 6: Final answer
    x = 683,534.40

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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.