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Finding the Fourth Proportional to 387,850.72, 534,970.86 and 251,641.32

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Solution

The fourth proportional to 387,850.72, 534,970.86 and 251,641.32 is: 347,094.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,850.72 : 534,970.86 = 251,641.32 : x
  2. Step 2: Convert to fraction form
    387,850.72/534,970.86 = 251,641.32/x
  3. Step 3: Cross multiply
    387,850.72x = 534,970.86 × 251,641.32
  4. Step 4: Simplify right side
    387,850.72x = 134,620,773,371.94
  5. Step 5: Solve for x
    x = 134,620,773,371.94/387,850.72
  6. Step 6: Final answer
    x = 347,094.30

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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.