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Finding the Fourth Proportional to 486,040.60, 729,060.90 and 418,389.40

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Solution

The fourth proportional to 486,040.60, 729,060.90 and 418,389.40 is: 627,584.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,040.60 : 729,060.90 = 418,389.40 : x
  2. Step 2: Convert to fraction form
    486,040.60/729,060.90 = 418,389.40/x
  3. Step 3: Cross multiply
    486,040.60x = 729,060.90 × 418,389.40
  4. Step 4: Simplify right side
    486,040.60x = 305,031,352,514.46
  5. Step 5: Solve for x
    x = 305,031,352,514.46/486,040.60
  6. Step 6: Final answer
    x = 627,584.10

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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.