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Finding the Fourth Proportional to 628,652.16, 867,558.71 and 387,074.11

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Solution

The fourth proportional to 628,652.16, 867,558.71 and 387,074.11 is: 534,173.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,652.16 : 867,558.71 = 387,074.11 : x
  2. Step 2: Convert to fraction form
    628,652.16/867,558.71 = 387,074.11/x
  3. Step 3: Cross multiply
    628,652.16x = 867,558.71 × 387,074.11
  4. Step 4: Simplify right side
    628,652.16x = 335,809,515,546.00
  5. Step 5: Solve for x
    x = 335,809,515,546.00/628,652.16
  6. Step 6: Final answer
    x = 534,173.80

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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.