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Finding the Fourth Proportional to 821,650.80, 1,230,143.40 and 821,650.80

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Solution

The fourth proportional to 821,650.80, 1,230,143.40 and 821,650.80 is: 1,230,143.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,650.80 : 1,230,143.40 = 821,650.80 : x
  2. Step 2: Convert to fraction form
    821,650.80/1,230,143.40 = 821,650.80/x
  3. Step 3: Cross multiply
    821,650.80x = 1,230,143.40 × 821,650.80
  4. Step 4: Simplify right side
    821,650.80x = 1,010,748,308,724.72
  5. Step 5: Solve for x
    x = 1,010,748,308,724.72/821,650.80
  6. Step 6: Final answer
    x = 1,230,143.40

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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.