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Finding the Fourth Proportional to 1,987,693.22, 2,979,038.45 and 1,076,840.53

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Solution

The fourth proportional to 1,987,693.22, 2,979,038.45 and 1,076,840.53 is: 1,613,905.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987,693.22 : 2,979,038.45 = 1,076,840.53 : x
  2. Step 2: Convert to fraction form
    1,987,693.22/2,979,038.45 = 1,076,840.53/x
  3. Step 3: Cross multiply
    1,987,693.22x = 2,979,038.45 × 1,076,840.53
  4. Step 4: Simplify right side
    1,987,693.22x = 3,207,949,338,632.88
  5. Step 5: Solve for x
    x = 3,207,949,338,632.88/1,987,693.22
  6. Step 6: Final answer
    x = 1,613,905.66

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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.