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Finding the Fourth Proportional to 312,846.75, 432,084.92 and 212,069.79

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Solution

The fourth proportional to 312,846.75, 432,084.92 and 212,069.79 is: 292,897.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,846.75 : 432,084.92 = 212,069.79 : x
  2. Step 2: Convert to fraction form
    312,846.75/432,084.92 = 212,069.79/x
  3. Step 3: Cross multiply
    312,846.75x = 432,084.92 × 212,069.79
  4. Step 4: Simplify right side
    312,846.75x = 91,632,157,186.22
  5. Step 5: Solve for x
    x = 91,632,157,186.22/312,846.75
  6. Step 6: Final answer
    x = 292,897.90

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1.5x scale

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.