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Finding the Fourth Proportional to 520,615.90, 780,923.85 and 310,491.10

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Solution

The fourth proportional to 520,615.90, 780,923.85 and 310,491.10 is: 465,736.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,615.90 : 780,923.85 = 310,491.10 : x
  2. Step 2: Convert to fraction form
    520,615.90/780,923.85 = 310,491.10/x
  3. Step 3: Cross multiply
    520,615.90x = 780,923.85 × 310,491.10
  4. Step 4: Simplify right side
    520,615.90x = 242,469,905,202.74
  5. Step 5: Solve for x
    x = 242,469,905,202.74/520,615.90
  6. Step 6: Final answer
    x = 465,736.65

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Similar ratio
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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.