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Finding the Fourth Proportional to 387,768.40, 581,652.60 and 238,469.20

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Solution

The fourth proportional to 387,768.40, 581,652.60 and 238,469.20 is: 357,703.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,768.40 : 581,652.60 = 238,469.20 : x
  2. Step 2: Convert to fraction form
    387,768.40/581,652.60 = 238,469.20/x
  3. Step 3: Cross multiply
    387,768.40x = 581,652.60 × 238,469.20
  4. Step 4: Simplify right side
    387,768.40x = 138,706,230,199.92
  5. Step 5: Solve for x
    x = 138,706,230,199.92/387,768.40
  6. Step 6: Final answer
    x = 357,703.80

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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.