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Finding the Fourth Proportional to 557,405.90, 836,108.85 and 520,081.10

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Solution

The fourth proportional to 557,405.90, 836,108.85 and 520,081.10 is: 780,121.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,405.90 : 836,108.85 = 520,081.10 : x
  2. Step 2: Convert to fraction form
    557,405.90/836,108.85 = 520,081.10/x
  3. Step 3: Cross multiply
    557,405.90x = 836,108.85 × 520,081.10
  4. Step 4: Simplify right side
    557,405.90x = 434,844,410,427.74
  5. Step 5: Solve for x
    x = 434,844,410,427.74/557,405.90
  6. Step 6: Final answer
    x = 780,121.65

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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.