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Finding the Fourth Proportional to 387,354.52, 534,576.48 and 217,588.76

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Solution

The fourth proportional to 387,354.52, 534,576.48 and 217,588.76 is: 300,287.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,354.52 : 534,576.48 = 217,588.76 : x
  2. Step 2: Convert to fraction form
    387,354.52/534,576.48 = 217,588.76/x
  3. Step 3: Cross multiply
    387,354.52x = 534,576.48 × 217,588.76
  4. Step 4: Simplify right side
    387,354.52x = 116,317,833,408.37
  5. Step 5: Solve for x
    x = 116,317,833,408.37/387,354.52
  6. Step 6: Final answer
    x = 300,287.79

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1.5x scale

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.