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Finding the Fourth Proportional to 310,881.46, 428,985.78 and 174,912.40

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Solution

The fourth proportional to 310,881.46, 428,985.78 and 174,912.40 is: 241,361.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,881.46 : 428,985.78 = 174,912.40 : x
  2. Step 2: Convert to fraction form
    310,881.46/428,985.78 = 174,912.40/x
  3. Step 3: Cross multiply
    310,881.46x = 428,985.78 × 174,912.40
  4. Step 4: Simplify right side
    310,881.46x = 75,034,932,345.67
  5. Step 5: Solve for x
    x = 75,034,932,345.67/310,881.46
  6. Step 6: Final answer
    x = 241,361.88

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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.