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Finding the Fourth Proportional to 561,431.88, 774,556.29 and 346,198.28

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Solution

The fourth proportional to 561,431.88, 774,556.29 and 346,198.28 is: 477,618.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,431.88 : 774,556.29 = 346,198.28 : x
  2. Step 2: Convert to fraction form
    561,431.88/774,556.29 = 346,198.28/x
  3. Step 3: Cross multiply
    561,431.88x = 774,556.29 × 346,198.28
  4. Step 4: Simplify right side
    561,431.88x = 268,150,051,488.40
  5. Step 5: Solve for x
    x = 268,150,051,488.40/561,431.88
  6. Step 6: Final answer
    x = 477,618.14

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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.