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Finding the Fourth Proportional to 572,408.40, 859,039.20 and 218,114.40

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Solution

The fourth proportional to 572,408.40, 859,039.20 and 218,114.40 is: 327,334.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,408.40 : 859,039.20 = 218,114.40 : x
  2. Step 2: Convert to fraction form
    572,408.40/859,039.20 = 218,114.40/x
  3. Step 3: Cross multiply
    572,408.40x = 859,039.20 × 218,114.40
  4. Step 4: Simplify right side
    572,408.40x = 187,368,819,684.48
  5. Step 5: Solve for x
    x = 187,368,819,684.48/572,408.40
  6. Step 6: Final answer
    x = 327,334.15

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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.