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Finding the Fourth Proportional to 402,862.90, 603,310.20 and 302,479.60

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Solution

The fourth proportional to 402,862.90, 603,310.20 and 302,479.60 is: 452,980.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,862.90 : 603,310.20 = 302,479.60 : x
  2. Step 2: Convert to fraction form
    402,862.90/603,310.20 = 302,479.60/x
  3. Step 3: Cross multiply
    402,862.90x = 603,310.20 × 302,479.60
  4. Step 4: Simplify right side
    402,862.90x = 182,489,027,971.92
  5. Step 5: Solve for x
    x = 182,489,027,971.92/402,862.90
  6. Step 6: Final answer
    x = 452,980.48

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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.