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Finding the Fourth Proportional to 378,912.40, 567,056.40 and 260,814.40

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Solution

The fourth proportional to 378,912.40, 567,056.40 and 260,814.40 is: 390,318.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,912.40 : 567,056.40 = 260,814.40 : x
  2. Step 2: Convert to fraction form
    378,912.40/567,056.40 = 260,814.40/x
  3. Step 3: Cross multiply
    378,912.40x = 567,056.40 × 260,814.40
  4. Step 4: Simplify right side
    378,912.40x = 147,896,474,732.16
  5. Step 5: Solve for x
    x = 147,896,474,732.16/378,912.40
  6. Step 6: Final answer
    x = 390,318.38

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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.