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Finding the Fourth Proportional to 310,777.98, 428,870.49 and 172,954.60

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Solution

The fourth proportional to 310,777.98, 428,870.49 and 172,954.60 is: 238,675.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,777.98 : 428,870.49 = 172,954.60 : x
  2. Step 2: Convert to fraction form
    310,777.98/428,870.49 = 172,954.60/x
  3. Step 3: Cross multiply
    310,777.98x = 428,870.49 × 172,954.60
  4. Step 4: Simplify right side
    310,777.98x = 74,175,124,049.75
  5. Step 5: Solve for x
    x = 74,175,124,049.75/310,777.98
  6. Step 6: Final answer
    x = 238,675.61

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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.