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Finding the Fourth Proportional to 1,299,778.56, 1,789,706.88 and 1,137,726.72

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Solution

The fourth proportional to 1,299,778.56, 1,789,706.88 and 1,137,726.72 is: 1,566,572.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299,778.56 : 1,789,706.88 = 1,137,726.72 : x
  2. Step 2: Convert to fraction form
    1,299,778.56/1,789,706.88 = 1,137,726.72/x
  3. Step 3: Cross multiply
    1,299,778.56x = 1,789,706.88 × 1,137,726.72
  4. Step 4: Simplify right side
    1,299,778.56x = 2,036,197,338,343.83
  5. Step 5: Solve for x
    x = 2,036,197,338,343.83/1,299,778.56
  6. Step 6: Final answer
    x = 1,566,572.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.