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Finding the Fourth Proportional to 387,293.66, 534,454.59 and 215,207.18

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Solution

The fourth proportional to 387,293.66, 534,454.59 and 215,207.18 is: 296,979.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,293.66 : 534,454.59 = 215,207.18 : x
  2. Step 2: Convert to fraction form
    387,293.66/534,454.59 = 215,207.18/x
  3. Step 3: Cross multiply
    387,293.66x = 534,454.59 × 215,207.18
  4. Step 4: Simplify right side
    387,293.66x = 115,018,465,151.96
  5. Step 5: Solve for x
    x = 115,018,465,151.96/387,293.66
  6. Step 6: Final answer
    x = 296,979.98

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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.