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Finding the Fourth Proportional to 391,485.77, 587,240.88 and 186,275.49

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Solution

The fourth proportional to 391,485.77, 587,240.88 and 186,275.49 is: 279,419.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,485.77 : 587,240.88 = 186,275.49 : x
  2. Step 2: Convert to fraction form
    391,485.77/587,240.88 = 186,275.49/x
  3. Step 3: Cross multiply
    391,485.77x = 587,240.88 × 186,275.49
  4. Step 4: Simplify right side
    391,485.77x = 109,388,582,670.03
  5. Step 5: Solve for x
    x = 109,388,582,670.03/391,485.77
  6. Step 6: Final answer
    x = 279,419.05

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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.