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Finding the Fourth Proportional to 1,159,625.20, 1,739,437.80 and 739,721.20

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Solution

The fourth proportional to 1,159,625.20, 1,739,437.80 and 739,721.20 is: 1,109,581.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,159,625.20 : 1,739,437.80 = 739,721.20 : x
  2. Step 2: Convert to fraction form
    1,159,625.20/1,739,437.80 = 739,721.20/x
  3. Step 3: Cross multiply
    1,159,625.20x = 1,739,437.80 × 739,721.20
  4. Step 4: Simplify right side
    1,159,625.20x = 1,286,699,016,741.36
  5. Step 5: Solve for x
    x = 1,286,699,016,741.36/1,159,625.20
  6. Step 6: Final answer
    x = 1,109,581.80

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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.