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Finding the Fourth Proportional to 821,445.60, 1,230,843.60 and 465,400.80

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Solution

The fourth proportional to 821,445.60, 1,230,843.60 and 465,400.80 is: 697,350.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,445.60 : 1,230,843.60 = 465,400.80 : x
  2. Step 2: Convert to fraction form
    821,445.60/1,230,843.60 = 465,400.80/x
  3. Step 3: Cross multiply
    821,445.60x = 1,230,843.60 × 465,400.80
  4. Step 4: Simplify right side
    821,445.60x = 572,835,596,114.88
  5. Step 5: Solve for x
    x = 572,835,596,114.88/821,445.60
  6. Step 6: Final answer
    x = 697,350.62

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1.5x scale

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.