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Finding the Fourth Proportional to 615,128.40, 922,415.76 and 259,959.60

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Solution

The fourth proportional to 615,128.40, 922,415.76 and 259,959.60 is: 389,822.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,128.40 : 922,415.76 = 259,959.60 : x
  2. Step 2: Convert to fraction form
    615,128.40/922,415.76 = 259,959.60/x
  3. Step 3: Cross multiply
    615,128.40x = 922,415.76 × 259,959.60
  4. Step 4: Simplify right side
    615,128.40x = 239,790,832,003.30
  5. Step 5: Solve for x
    x = 239,790,832,003.30/615,128.40
  6. Step 6: Final answer
    x = 389,822.40

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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.