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Finding the Fourth Proportional to 567,618.56, 783,318.88 and 312,978.88

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Solution

The fourth proportional to 567,618.56, 783,318.88 and 312,978.88 is: 431,913.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    567,618.56 : 783,318.88 = 312,978.88 : x
  2. Step 2: Convert to fraction form
    567,618.56/783,318.88 = 312,978.88/x
  3. Step 3: Cross multiply
    567,618.56x = 783,318.88 × 312,978.88
  4. Step 4: Simplify right side
    567,618.56x = 245,162,265,745.25
  5. Step 5: Solve for x
    x = 245,162,265,745.25/567,618.56
  6. Step 6: Final answer
    x = 431,913.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.