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Finding the Fourth Proportional to 821,656.80, 1,230,152.40 and 821,656.80

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Solution

The fourth proportional to 821,656.80, 1,230,152.40 and 821,656.80 is: 1,230,152.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,656.80 : 1,230,152.40 = 821,656.80 : x
  2. Step 2: Convert to fraction form
    821,656.80/1,230,152.40 = 821,656.80/x
  3. Step 3: Cross multiply
    821,656.80x = 1,230,152.40 × 821,656.80
  4. Step 4: Simplify right side
    821,656.80x = 1,010,763,084,496.32
  5. Step 5: Solve for x
    x = 1,010,763,084,496.32/821,656.80
  6. Step 6: Final answer
    x = 1,230,152.40

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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.