Home / 387,290.18-534,449.78-215,203.69

Finding the Fourth Proportional to 387,290.18, 534,449.78 and 215,203.69

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Solution

The fourth proportional to 387,290.18, 534,449.78 and 215,203.69 is: 296,975.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,290.18 : 534,449.78 = 215,203.69 : x
  2. Step 2: Convert to fraction form
    387,290.18/534,449.78 = 215,203.69/x
  3. Step 3: Cross multiply
    387,290.18x = 534,449.78 × 215,203.69
  4. Step 4: Simplify right side
    387,290.18x = 115,015,564,775.69
  5. Step 5: Solve for x
    x = 115,015,564,775.69/387,290.18
  6. Step 6: Final answer
    x = 296,975.16

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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.