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Finding the Fourth Proportional to 386,152.40, 578,537.40 and 330,856.40

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Solution

The fourth proportional to 386,152.40, 578,537.40 and 330,856.40 is: 495,692.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,152.40 : 578,537.40 = 330,856.40 : x
  2. Step 2: Convert to fraction form
    386,152.40/578,537.40 = 330,856.40/x
  3. Step 3: Cross multiply
    386,152.40x = 578,537.40 × 330,856.40
  4. Step 4: Simplify right side
    386,152.40x = 191,412,801,429.36
  5. Step 5: Solve for x
    x = 191,412,801,429.36/386,152.40
  6. Step 6: Final answer
    x = 495,692.38

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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.