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Finding the Fourth Proportional to 1,254,220.80, 1,878,220.80 and 1,005,388.80

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Solution

The fourth proportional to 1,254,220.80, 1,878,220.80 and 1,005,388.80 is: 1,505,589.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254,220.80 : 1,878,220.80 = 1,005,388.80 : x
  2. Step 2: Convert to fraction form
    1,254,220.80/1,878,220.80 = 1,005,388.80/x
  3. Step 3: Cross multiply
    1,254,220.80x = 1,878,220.80 × 1,005,388.80
  4. Step 4: Simplify right side
    1,254,220.80x = 1,888,342,156,247.04
  5. Step 5: Solve for x
    x = 1,888,342,156,247.04/1,254,220.80
  6. Step 6: Final answer
    x = 1,505,589.89

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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.