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Finding the Fourth Proportional to 315,836.52, 435,860.10 and 172,602.60

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Solution

The fourth proportional to 315,836.52, 435,860.10 and 172,602.60 is: 238,194.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,836.52 : 435,860.10 = 172,602.60 : x
  2. Step 2: Convert to fraction form
    315,836.52/435,860.10 = 172,602.60/x
  3. Step 3: Cross multiply
    315,836.52x = 435,860.10 × 172,602.60
  4. Step 4: Simplify right side
    315,836.52x = 75,230,586,496.26
  5. Step 5: Solve for x
    x = 75,230,586,496.26/315,836.52
  6. Step 6: Final answer
    x = 238,194.70

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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.