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Finding the Fourth Proportional to 1,315,972.80, 1,974,880.80 and 843,806.40

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Solution

The fourth proportional to 1,315,972.80, 1,974,880.80 and 843,806.40 is: 1,266,300.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,972.80 : 1,974,880.80 = 843,806.40 : x
  2. Step 2: Convert to fraction form
    1,315,972.80/1,974,880.80 = 843,806.40/x
  3. Step 3: Cross multiply
    1,315,972.80x = 1,974,880.80 × 843,806.40
  4. Step 4: Simplify right side
    1,315,972.80x = 1,666,417,058,277.12
  5. Step 5: Solve for x
    x = 1,666,417,058,277.12/1,315,972.80
  6. Step 6: Final answer
    x = 1,266,300.53

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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.