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Finding the Fourth Proportional to 691,054.44, 953,618.34 and 389,229

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Solution

The fourth proportional to 691,054.44, 953,618.34 and 389,229 is: 537,115.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,054.44 : 953,618.34 = 389,229 : x
  2. Step 2: Convert to fraction form
    691,054.44/953,618.34 = 389,229/x
  3. Step 3: Cross multiply
    691,054.44x = 953,618.34 × 389,229
  4. Step 4: Simplify right side
    691,054.44x = 371,175,912,859.86
  5. Step 5: Solve for x
    x = 371,175,912,859.86/691,054.44
  6. Step 6: Final answer
    x = 537,115.30

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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.