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Finding the Fourth Proportional to 1,315,948.80, 1,974,844.80 and 843,782.40

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Solution

The fourth proportional to 1,315,948.80, 1,974,844.80 and 843,782.40 is: 1,266,264.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,948.80 : 1,974,844.80 = 843,782.40 : x
  2. Step 2: Convert to fraction form
    1,315,948.80/1,974,844.80 = 843,782.40/x
  3. Step 3: Cross multiply
    1,315,948.80x = 1,974,844.80 × 843,782.40
  4. Step 4: Simplify right side
    1,315,948.80x = 1,666,339,284,971.52
  5. Step 5: Solve for x
    x = 1,666,339,284,971.52/1,315,948.80
  6. Step 6: Final answer
    x = 1,266,264.53

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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.