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Finding the Fourth Proportional to 1,409,721.81, 1,945,395.12 and 797,990.59

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Solution

The fourth proportional to 1,409,721.81, 1,945,395.12 and 797,990.59 is: 1,101,215.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409,721.81 : 1,945,395.12 = 797,990.59 : x
  2. Step 2: Convert to fraction form
    1,409,721.81/1,945,395.12 = 797,990.59/x
  3. Step 3: Cross multiply
    1,409,721.81x = 1,945,395.12 × 797,990.59
  4. Step 4: Simplify right side
    1,409,721.81x = 1,552,406,999,591.92
  5. Step 5: Solve for x
    x = 1,552,406,999,591.92/1,409,721.81
  6. Step 6: Final answer
    x = 1,101,215.14

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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.