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Finding the Fourth Proportional to 628,652.94, 867,559.79 and 387,074.90

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Solution

The fourth proportional to 628,652.94, 867,559.79 and 387,074.90 is: 534,174.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,652.94 : 867,559.79 = 387,074.90 : x
  2. Step 2: Convert to fraction form
    628,652.94/867,559.79 = 387,074.90/x
  3. Step 3: Cross multiply
    628,652.94x = 867,559.79 × 387,074.90
  4. Step 4: Simplify right side
    628,652.94x = 335,810,615,588.16
  5. Step 5: Solve for x
    x = 335,810,615,588.16/628,652.94
  6. Step 6: Final answer
    x = 534,174.89

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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.