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Finding the Fourth Proportional to 310,781.21, 428,882.45 and 183,456.77

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Solution

The fourth proportional to 310,781.21, 428,882.45 and 183,456.77 is: 253,172.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,781.21 : 428,882.45 = 183,456.77 : x
  2. Step 2: Convert to fraction form
    310,781.21/428,882.45 = 183,456.77/x
  3. Step 3: Cross multiply
    310,781.21x = 428,882.45 × 183,456.77
  4. Step 4: Simplify right side
    310,781.21x = 78,681,385,924.99
  5. Step 5: Solve for x
    x = 78,681,385,924.99/310,781.21
  6. Step 6: Final answer
    x = 253,172.92

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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.