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Finding the Fourth Proportional to 310,376.16, 428,305.31 and 181,326.60

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Solution

The fourth proportional to 310,376.16, 428,305.31 and 181,326.60 is: 250,222.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,376.16 : 428,305.31 = 181,326.60 : x
  2. Step 2: Convert to fraction form
    310,376.16/428,305.31 = 181,326.60/x
  3. Step 3: Cross multiply
    310,376.16x = 428,305.31 × 181,326.60
  4. Step 4: Simplify right side
    310,376.16x = 77,663,144,717.61
  5. Step 5: Solve for x
    x = 77,663,144,717.61/310,376.16
  6. Step 6: Final answer
    x = 250,222.65

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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.