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Finding the Fourth Proportional to 328,097.60, 492,085.65 and 91,391.30

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Solution

The fourth proportional to 328,097.60, 492,085.65 and 91,391.30 is: 137,070.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,097.60 : 492,085.65 = 91,391.30 : x
  2. Step 2: Convert to fraction form
    328,097.60/492,085.65 = 91,391.30/x
  3. Step 3: Cross multiply
    328,097.60x = 492,085.65 × 91,391.30
  4. Step 4: Simplify right side
    328,097.60x = 44,972,347,264.85
  5. Step 5: Solve for x
    x = 44,972,347,264.85/328,097.60
  6. Step 6: Final answer
    x = 137,070.03

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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.