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Finding the Fourth Proportional to 387,293.16, 534,453.90 and 215,206.68

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Solution

The fourth proportional to 387,293.16, 534,453.90 and 215,206.68 is: 296,979.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,293.16 : 534,453.90 = 215,206.68 : x
  2. Step 2: Convert to fraction form
    387,293.16/534,453.90 = 215,206.68/x
  3. Step 3: Cross multiply
    387,293.16x = 534,453.90 × 215,206.68
  4. Step 4: Simplify right side
    387,293.16x = 115,018,049,432.05
  5. Step 5: Solve for x
    x = 115,018,049,432.05/387,293.16
  6. Step 6: Final answer
    x = 296,979.29

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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.