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Finding the Fourth Proportional to 357,928.30, 536,880.07 and 91,691.43

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Solution

The fourth proportional to 357,928.30, 536,880.07 and 91,691.43 is: 137,533.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,928.30 : 536,880.07 = 91,691.43 : x
  2. Step 2: Convert to fraction form
    357,928.30/536,880.07 = 91,691.43/x
  3. Step 3: Cross multiply
    357,928.30x = 536,880.07 × 91,691.43
  4. Step 4: Simplify right side
    357,928.30x = 49,227,301,356.80
  5. Step 5: Solve for x
    x = 49,227,301,356.80/357,928.30
  6. Step 6: Final answer
    x = 137,533.97

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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.