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Finding the Fourth Proportional to 315,270.97, 435,084.44 and 172,038.87

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Solution

The fourth proportional to 315,270.97, 435,084.44 and 172,038.87 is: 237,419.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,270.97 : 435,084.44 = 172,038.87 : x
  2. Step 2: Convert to fraction form
    315,270.97/435,084.44 = 172,038.87/x
  3. Step 3: Cross multiply
    315,270.97x = 435,084.44 × 172,038.87
  4. Step 4: Simplify right side
    315,270.97x = 74,851,435,412.18
  5. Step 5: Solve for x
    x = 74,851,435,412.18/315,270.97
  6. Step 6: Final answer
    x = 237,419.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.