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Finding the Fourth Proportional to 345,474.40, 476,743.44 and 211,338.40

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Solution

The fourth proportional to 345,474.40, 476,743.44 and 211,338.40 is: 291,640.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,474.40 : 476,743.44 = 211,338.40 : x
  2. Step 2: Convert to fraction form
    345,474.40/476,743.44 = 211,338.40/x
  3. Step 3: Cross multiply
    345,474.40x = 476,743.44 × 211,338.40
  4. Step 4: Simplify right side
    345,474.40x = 100,754,195,820.10
  5. Step 5: Solve for x
    x = 100,754,195,820.10/345,474.40
  6. Step 6: Final answer
    x = 291,640.12

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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.