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Finding the Fourth Proportional to 498,328.70, 747,371.55 and 143,305.70

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Solution

The fourth proportional to 498,328.70, 747,371.55 and 143,305.70 is: 214,923.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,328.70 : 747,371.55 = 143,305.70 : x
  2. Step 2: Convert to fraction form
    498,328.70/747,371.55 = 143,305.70/x
  3. Step 3: Cross multiply
    498,328.70x = 747,371.55 × 143,305.70
  4. Step 4: Simplify right side
    498,328.70x = 107,102,603,132.84
  5. Step 5: Solve for x
    x = 107,102,603,132.84/498,328.70
  6. Step 6: Final answer
    x = 214,923.61

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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.