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Finding the Fourth Proportional to 387,667.82, 581,122.08 and 216,972.90

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Solution

The fourth proportional to 387,667.82, 581,122.08 and 216,972.90 is: 325,246.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,667.82 : 581,122.08 = 216,972.90 : x
  2. Step 2: Convert to fraction form
    387,667.82/581,122.08 = 216,972.90/x
  3. Step 3: Cross multiply
    387,667.82x = 581,122.08 × 216,972.90
  4. Step 4: Simplify right side
    387,667.82x = 126,087,742,951.63
  5. Step 5: Solve for x
    x = 126,087,742,951.63/387,667.82
  6. Step 6: Final answer
    x = 325,246.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.