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Finding the Fourth Proportional to 387,278.48, 581,145 and 162,621.56

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Solution

The fourth proportional to 387,278.48, 581,145 and 162,621.56 is: 244,027.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,278.48 : 581,145 = 162,621.56 : x
  2. Step 2: Convert to fraction form
    387,278.48/581,145 = 162,621.56/x
  3. Step 3: Cross multiply
    387,278.48x = 581,145 × 162,621.56
  4. Step 4: Simplify right side
    387,278.48x = 94,506,706,486.20
  5. Step 5: Solve for x
    x = 94,506,706,486.20/387,278.48
  6. Step 6: Final answer
    x = 244,027.78

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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.