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Finding the Fourth Proportional to 520,928.40, 781,392.60 and 343,635.60

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Solution

The fourth proportional to 520,928.40, 781,392.60 and 343,635.60 is: 515,453.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,928.40 : 781,392.60 = 343,635.60 : x
  2. Step 2: Convert to fraction form
    520,928.40/781,392.60 = 343,635.60/x
  3. Step 3: Cross multiply
    520,928.40x = 781,392.60 × 343,635.60
  4. Step 4: Simplify right side
    520,928.40x = 268,514,314,936.56
  5. Step 5: Solve for x
    x = 268,514,314,936.56/520,928.40
  6. Step 6: Final answer
    x = 515,453.40

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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.