Home / 387,289.18-534,448.40-215,202.69

Finding the Fourth Proportional to 387,289.18, 534,448.40 and 215,202.69

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Solution

The fourth proportional to 387,289.18, 534,448.40 and 215,202.69 is: 296,973.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,289.18 : 534,448.40 = 215,202.69 : x
  2. Step 2: Convert to fraction form
    387,289.18/534,448.40 = 215,202.69/x
  3. Step 3: Cross multiply
    387,289.18x = 534,448.40 × 215,202.69
  4. Step 4: Simplify right side
    387,289.18x = 115,014,733,346.20
  5. Step 5: Solve for x
    x = 115,014,733,346.20/387,289.18
  6. Step 6: Final answer
    x = 296,973.78

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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.