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Finding the Fourth Proportional to 520,082.40, 780,123.60 and 520,082.40

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Solution

The fourth proportional to 520,082.40, 780,123.60 and 520,082.40 is: 780,123.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,082.40 : 780,123.60 = 520,082.40 : x
  2. Step 2: Convert to fraction form
    520,082.40/780,123.60 = 520,082.40/x
  3. Step 3: Cross multiply
    520,082.40x = 780,123.60 × 520,082.40
  4. Step 4: Simplify right side
    520,082.40x = 405,728,554,184.64
  5. Step 5: Solve for x
    x = 405,728,554,184.64/520,082.40
  6. Step 6: Final answer
    x = 780,123.60

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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.