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Finding the Fourth Proportional to 357,470.80, 536,205.78 and 91,231.30

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Solution

The fourth proportional to 357,470.80, 536,205.78 and 91,231.30 is: 136,846.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,470.80 : 536,205.78 = 91,231.30 : x
  2. Step 2: Convert to fraction form
    357,470.80/536,205.78 = 91,231.30/x
  3. Step 3: Cross multiply
    357,470.80x = 536,205.78 × 91,231.30
  4. Step 4: Simplify right side
    357,470.80x = 48,918,750,376.91
  5. Step 5: Solve for x
    x = 48,918,750,376.91/357,470.80
  6. Step 6: Final answer
    x = 136,846.84

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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.