Home / 387,417.21-534,609.81-215,324.01

Finding the Fourth Proportional to 387,417.21, 534,609.81 and 215,324.01

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Solution

The fourth proportional to 387,417.21, 534,609.81 and 215,324.01 is: 297,132.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,417.21 : 534,609.81 = 215,324.01 : x
  2. Step 2: Convert to fraction form
    387,417.21/534,609.81 = 215,324.01/x
  3. Step 3: Cross multiply
    387,417.21x = 534,609.81 × 215,324.01
  4. Step 4: Simplify right side
    387,417.21x = 115,114,328,074.54
  5. Step 5: Solve for x
    x = 115,114,328,074.54/387,417.21
  6. Step 6: Final answer
    x = 297,132.72

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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.