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Finding the Fourth Proportional to 1,317,965.19, 1,974,902.97 and 913,945.47

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Solution

The fourth proportional to 1,317,965.19, 1,974,902.97 and 913,945.47 is: 1,369,500.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317,965.19 : 1,974,902.97 = 913,945.47 : x
  2. Step 2: Convert to fraction form
    1,317,965.19/1,974,902.97 = 913,945.47/x
  3. Step 3: Cross multiply
    1,317,965.19x = 1,974,902.97 × 913,945.47
  4. Step 4: Simplify right side
    1,317,965.19x = 1,804,953,623,121.05
  5. Step 5: Solve for x
    x = 1,804,953,623,121.05/1,317,965.19
  6. Step 6: Final answer
    x = 1,369,500.22

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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.