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Finding the Fourth Proportional to 520,414.80, 780,913.80 and 220,844.40

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Solution

The fourth proportional to 520,414.80, 780,913.80 and 220,844.40 is: 331,390.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,414.80 : 780,913.80 = 220,844.40 : x
  2. Step 2: Convert to fraction form
    520,414.80/780,913.80 = 220,844.40/x
  3. Step 3: Cross multiply
    520,414.80x = 780,913.80 × 220,844.40
  4. Step 4: Simplify right side
    520,414.80x = 172,460,439,612.72
  5. Step 5: Solve for x
    x = 172,460,439,612.72/520,414.80
  6. Step 6: Final answer
    x = 331,390.34

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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.