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Finding the Fourth Proportional to 310,587.80, 428,436.11 and 186,376.65

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Solution

The fourth proportional to 310,587.80, 428,436.11 and 186,376.65 is: 257,094.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,587.80 : 428,436.11 = 186,376.65 : x
  2. Step 2: Convert to fraction form
    310,587.80/428,436.11 = 186,376.65/x
  3. Step 3: Cross multiply
    310,587.80x = 428,436.11 × 186,376.65
  4. Step 4: Simplify right side
    310,587.80x = 79,850,485,780.14
  5. Step 5: Solve for x
    x = 79,850,485,780.14/310,587.80
  6. Step 6: Final answer
    x = 257,094.73

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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.