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Finding the Fourth Proportional to 385,969.20, 578,955.20 and 273,308.64

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Solution

The fourth proportional to 385,969.20, 578,955.20 and 273,308.64 is: 409,963.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,969.20 : 578,955.20 = 273,308.64 : x
  2. Step 2: Convert to fraction form
    385,969.20/578,955.20 = 273,308.64/x
  3. Step 3: Cross multiply
    385,969.20x = 578,955.20 × 273,308.64
  4. Step 4: Simplify right side
    385,969.20x = 158,233,456,966.39
  5. Step 5: Solve for x
    x = 158,233,456,966.39/385,969.20
  6. Step 6: Final answer
    x = 409,963.95

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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.