Home / 387,387.41-534,608.33-215,308.80

Finding the Fourth Proportional to 387,387.41, 534,608.33 and 215,308.80

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Solution

The fourth proportional to 387,387.41, 534,608.33 and 215,308.80 is: 297,133.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,387.41 : 534,608.33 = 215,308.80 : x
  2. Step 2: Convert to fraction form
    387,387.41/534,608.33 = 215,308.80/x
  3. Step 3: Cross multiply
    387,387.41x = 534,608.33 × 215,308.80
  4. Step 4: Simplify right side
    387,387.41x = 115,105,876,925.76
  5. Step 5: Solve for x
    x = 115,105,876,925.76/387,387.41
  6. Step 6: Final answer
    x = 297,133.76

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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.