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Finding the Fourth Proportional to 821,657.80, 1,230,153.90 and 821,657.80

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Solution

The fourth proportional to 821,657.80, 1,230,153.90 and 821,657.80 is: 1,230,153.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,657.80 : 1,230,153.90 = 821,657.80 : x
  2. Step 2: Convert to fraction form
    821,657.80/1,230,153.90 = 821,657.80/x
  3. Step 3: Cross multiply
    821,657.80x = 1,230,153.90 × 821,657.80
  4. Step 4: Simplify right side
    821,657.80x = 1,010,765,547,135.42
  5. Step 5: Solve for x
    x = 1,010,765,547,135.42/821,657.80
  6. Step 6: Final answer
    x = 1,230,153.90

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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.