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Finding the Fourth Proportional to 513,680.80, 769,484.40 and 356,087.20

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Solution

The fourth proportional to 513,680.80, 769,484.40 and 356,087.20 is: 533,412.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,680.80 : 769,484.40 = 356,087.20 : x
  2. Step 2: Convert to fraction form
    513,680.80/769,484.40 = 356,087.20/x
  3. Step 3: Cross multiply
    513,680.80x = 769,484.40 × 356,087.20
  4. Step 4: Simplify right side
    513,680.80x = 274,003,545,439.68
  5. Step 5: Solve for x
    x = 274,003,545,439.68/513,680.80
  6. Step 6: Final answer
    x = 533,412.08

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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.