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Finding the Fourth Proportional to 394,659.84, 544,619.52 and 215,808

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Solution

The fourth proportional to 394,659.84, 544,619.52 and 215,808 is: 297,808.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,659.84 : 544,619.52 = 215,808 : x
  2. Step 2: Convert to fraction form
    394,659.84/544,619.52 = 215,808/x
  3. Step 3: Cross multiply
    394,659.84x = 544,619.52 × 215,808
  4. Step 4: Simplify right side
    394,659.84x = 117,533,249,372.16
  5. Step 5: Solve for x
    x = 117,533,249,372.16/394,659.84
  6. Step 6: Final answer
    x = 297,808.99

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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.