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Finding the Fourth Proportional to 391,484.77, 587,239.38 and 186,274.49

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Solution

The fourth proportional to 391,484.77, 587,239.38 and 186,274.49 is: 279,417.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,484.77 : 587,239.38 = 186,274.49 : x
  2. Step 2: Convert to fraction form
    391,484.77/587,239.38 = 186,274.49/x
  3. Step 3: Cross multiply
    391,484.77x = 587,239.38 × 186,274.49
  4. Step 4: Simplify right side
    391,484.77x = 109,387,713,081.22
  5. Step 5: Solve for x
    x = 109,387,713,081.22/391,484.77
  6. Step 6: Final answer
    x = 279,417.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.