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Finding the Fourth Proportional to 691,682.50, 954,521.85 and 389,876.50

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Solution

The fourth proportional to 691,682.50, 954,521.85 and 389,876.50 is: 538,029.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,682.50 : 954,521.85 = 389,876.50 : x
  2. Step 2: Convert to fraction form
    691,682.50/954,521.85 = 389,876.50/x
  3. Step 3: Cross multiply
    691,682.50x = 954,521.85 × 389,876.50
  4. Step 4: Simplify right side
    691,682.50x = 372,145,638,051.53
  5. Step 5: Solve for x
    x = 372,145,638,051.53/691,682.50
  6. Step 6: Final answer
    x = 538,029.57

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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.