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Finding the Fourth Proportional to 413,679.40, 620,519.10 and 256,215.40

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Solution

The fourth proportional to 413,679.40, 620,519.10 and 256,215.40 is: 384,323.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,679.40 : 620,519.10 = 256,215.40 : x
  2. Step 2: Convert to fraction form
    413,679.40/620,519.10 = 256,215.40/x
  3. Step 3: Cross multiply
    413,679.40x = 620,519.10 × 256,215.40
  4. Step 4: Simplify right side
    413,679.40x = 158,986,549,414.14
  5. Step 5: Solve for x
    x = 158,986,549,414.14/413,679.40
  6. Step 6: Final answer
    x = 384,323.10

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1.5x scale

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.