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Finding the Fourth Proportional to 353,078.60, 528,926.70 and 212,419.40

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Solution

The fourth proportional to 353,078.60, 528,926.70 and 212,419.40 is: 318,213.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,078.60 : 528,926.70 = 212,419.40 : x
  2. Step 2: Convert to fraction form
    353,078.60/528,926.70 = 212,419.40/x
  3. Step 3: Cross multiply
    353,078.60x = 528,926.70 × 212,419.40
  4. Step 4: Simplify right side
    353,078.60x = 112,354,292,257.98
  5. Step 5: Solve for x
    x = 112,354,292,257.98/353,078.60
  6. Step 6: Final answer
    x = 318,213.26

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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.