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Finding the Fourth Proportional to 391,682.51, 587,490.95 and 154,961.63

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Solution

The fourth proportional to 391,682.51, 587,490.95 and 154,961.63 is: 232,429.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,682.51 : 587,490.95 = 154,961.63 : x
  2. Step 2: Convert to fraction form
    391,682.51/587,490.95 = 154,961.63/x
  3. Step 3: Cross multiply
    391,682.51x = 587,490.95 × 154,961.63
  4. Step 4: Simplify right side
    391,682.51x = 91,038,552,672.20
  5. Step 5: Solve for x
    x = 91,038,552,672.20/391,682.51
  6. Step 6: Final answer
    x = 232,429.46

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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.