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Finding the Fourth Proportional to 567,138.16, 782,685.60 and 312,489.28

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Solution

The fourth proportional to 567,138.16, 782,685.60 and 312,489.28 is: 431,254.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    567,138.16 : 782,685.60 = 312,489.28 : x
  2. Step 2: Convert to fraction form
    567,138.16/782,685.60 = 312,489.28/x
  3. Step 3: Cross multiply
    567,138.16x = 782,685.60 × 312,489.28
  4. Step 4: Simplify right side
    567,138.16x = 244,580,859,610.37
  5. Step 5: Solve for x
    x = 244,580,859,610.37/567,138.16
  6. Step 6: Final answer
    x = 431,254.46

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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.