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Finding the Fourth Proportional to 520,769.01, 780,444.10 and 318,435.97

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Solution

The fourth proportional to 520,769.01, 780,444.10 and 318,435.97 is: 477,220.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,769.01 : 780,444.10 = 318,435.97 : x
  2. Step 2: Convert to fraction form
    520,769.01/780,444.10 = 318,435.97/x
  3. Step 3: Cross multiply
    520,769.01x = 780,444.10 × 318,435.97
  4. Step 4: Simplify right side
    520,769.01x = 248,521,474,810.37
  5. Step 5: Solve for x
    x = 248,521,474,810.37/520,769.01
  6. Step 6: Final answer
    x = 477,220.17

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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.