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Finding the Fourth Proportional to 328,172.77, 492,342.17 and 91,515.47

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Solution

The fourth proportional to 328,172.77, 492,342.17 and 91,515.47 is: 137,296.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,172.77 : 492,342.17 = 91,515.47 : x
  2. Step 2: Convert to fraction form
    328,172.77/492,342.17 = 91,515.47/x
  3. Step 3: Cross multiply
    328,172.77x = 492,342.17 × 91,515.47
  4. Step 4: Simplify right side
    328,172.77x = 45,056,925,710.67
  5. Step 5: Solve for x
    x = 45,056,925,710.67/328,172.77
  6. Step 6: Final answer
    x = 137,296.36

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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.