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Finding the Fourth Proportional to 560,968.88, 840,830 and 427,408.80

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Solution

The fourth proportional to 560,968.88, 840,830 and 427,408.80 is: 640,638.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    560,968.88 : 840,830 = 427,408.80 : x
  2. Step 2: Convert to fraction form
    560,968.88/840,830 = 427,408.80/x
  3. Step 3: Cross multiply
    560,968.88x = 840,830 × 427,408.80
  4. Step 4: Simplify right side
    560,968.88x = 359,378,141,304
  5. Step 5: Solve for x
    x = 359,378,141,304/560,968.88
  6. Step 6: Final answer
    x = 640,638.29

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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.