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Finding the Fourth Proportional to 1,097,687.80, 1,646,531.70 and 761,764.60

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Solution

The fourth proportional to 1,097,687.80, 1,646,531.70 and 761,764.60 is: 1,142,646.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097,687.80 : 1,646,531.70 = 761,764.60 : x
  2. Step 2: Convert to fraction form
    1,097,687.80/1,646,531.70 = 761,764.60/x
  3. Step 3: Cross multiply
    1,097,687.80x = 1,646,531.70 × 761,764.60
  4. Step 4: Simplify right side
    1,097,687.80x = 1,254,269,561,837.82
  5. Step 5: Solve for x
    x = 1,254,269,561,837.82/1,097,687.80
  6. Step 6: Final answer
    x = 1,142,646.90

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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.