Home / 821,211.60-1,231,702.20-260,302.80

Finding the Fourth Proportional to 821,211.60, 1,231,702.20 and 260,302.80

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Solution

The fourth proportional to 821,211.60, 1,231,702.20 and 260,302.80 is: 390,417.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,211.60 : 1,231,702.20 = 260,302.80 : x
  2. Step 2: Convert to fraction form
    821,211.60/1,231,702.20 = 260,302.80/x
  3. Step 3: Cross multiply
    821,211.60x = 1,231,702.20 × 260,302.80
  4. Step 4: Simplify right side
    821,211.60x = 320,615,531,426.16
  5. Step 5: Solve for x
    x = 320,615,531,426.16/821,211.60
  6. Step 6: Final answer
    x = 390,417.68

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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.