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Finding the Fourth Proportional to 556,616.80, 768,676.80 and 384,974.56

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Solution

The fourth proportional to 556,616.80, 768,676.80 and 384,974.56 is: 531,642.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,616.80 : 768,676.80 = 384,974.56 : x
  2. Step 2: Convert to fraction form
    556,616.80/768,676.80 = 384,974.56/x
  3. Step 3: Cross multiply
    556,616.80x = 768,676.80 × 384,974.56
  4. Step 4: Simplify right side
    556,616.80x = 295,921,012,862.21
  5. Step 5: Solve for x
    x = 295,921,012,862.21/556,616.80
  6. Step 6: Final answer
    x = 531,642.26

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1.5x scale

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.