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Finding the Fourth Proportional to 387,340.40, 581,010.60 and 106,857.20

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Solution

The fourth proportional to 387,340.40, 581,010.60 and 106,857.20 is: 160,285.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,340.40 : 581,010.60 = 106,857.20 : x
  2. Step 2: Convert to fraction form
    387,340.40/581,010.60 = 106,857.20/x
  3. Step 3: Cross multiply
    387,340.40x = 581,010.60 × 106,857.20
  4. Step 4: Simplify right side
    387,340.40x = 62,085,165,886.32
  5. Step 5: Solve for x
    x = 62,085,165,886.32/387,340.40
  6. Step 6: Final answer
    x = 160,285.80

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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.