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Finding the Fourth Proportional to 394,405.16, 544,279.14 and 215,557.16

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Solution

The fourth proportional to 394,405.16, 544,279.14 and 215,557.16 is: 297,468.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,405.16 : 544,279.14 = 215,557.16 : x
  2. Step 2: Convert to fraction form
    394,405.16/544,279.14 = 215,557.16/x
  3. Step 3: Cross multiply
    394,405.16x = 544,279.14 × 215,557.16
  4. Step 4: Simplify right side
    394,405.16x = 117,323,265,665.64
  5. Step 5: Solve for x
    x = 117,323,265,665.64/394,405.16
  6. Step 6: Final answer
    x = 297,468.89

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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.