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Finding the Fourth Proportional to 355,920.40, 534,010.20 and 145,709.20

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Solution

The fourth proportional to 355,920.40, 534,010.20 and 145,709.20 is: 218,616.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,920.40 : 534,010.20 = 145,709.20 : x
  2. Step 2: Convert to fraction form
    355,920.40/534,010.20 = 145,709.20/x
  3. Step 3: Cross multiply
    355,920.40x = 534,010.20 × 145,709.20
  4. Step 4: Simplify right side
    355,920.40x = 77,810,199,033.84
  5. Step 5: Solve for x
    x = 77,810,199,033.84/355,920.40
  6. Step 6: Final answer
    x = 218,616.86

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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.