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Finding the Fourth Proportional to 353,080.60, 528,929.70 and 212,421.40

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Solution

The fourth proportional to 353,080.60, 528,929.70 and 212,421.40 is: 318,216.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,080.60 : 528,929.70 = 212,421.40 : x
  2. Step 2: Convert to fraction form
    353,080.60/528,929.70 = 212,421.40/x
  3. Step 3: Cross multiply
    353,080.60x = 528,929.70 × 212,421.40
  4. Step 4: Simplify right side
    353,080.60x = 112,355,987,375.58
  5. Step 5: Solve for x
    x = 112,355,987,375.58/353,080.60
  6. Step 6: Final answer
    x = 318,216.26

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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.