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Finding the Fourth Proportional to 628,061.45, 866,445.03 and 418,556.43

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Solution

The fourth proportional to 628,061.45, 866,445.03 and 418,556.43 is: 577,421.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,061.45 : 866,445.03 = 418,556.43 : x
  2. Step 2: Convert to fraction form
    628,061.45/866,445.03 = 418,556.43/x
  3. Step 3: Cross multiply
    628,061.45x = 866,445.03 × 418,556.43
  4. Step 4: Simplify right side
    628,061.45x = 362,656,138,548.04
  5. Step 5: Solve for x
    x = 362,656,138,548.04/628,061.45
  6. Step 6: Final answer
    x = 577,421.43

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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.