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Finding the Fourth Proportional to 357,688.22, 536,531.25 and 91,448.78

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Solution

The fourth proportional to 357,688.22, 536,531.25 and 91,448.78 is: 137,172.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,688.22 : 536,531.25 = 91,448.78 : x
  2. Step 2: Convert to fraction form
    357,688.22/536,531.25 = 91,448.78/x
  3. Step 3: Cross multiply
    357,688.22x = 536,531.25 × 91,448.78
  4. Step 4: Simplify right side
    357,688.22x = 49,065,128,244.38
  5. Step 5: Solve for x
    x = 49,065,128,244.38/357,688.22
  6. Step 6: Final answer
    x = 137,172.89

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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.