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Finding the Fourth Proportional to 353,272.78, 530,050.72 and 128,648.85

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Solution

The fourth proportional to 353,272.78, 530,050.72 and 128,648.85 is: 193,024.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,272.78 : 530,050.72 = 128,648.85 : x
  2. Step 2: Convert to fraction form
    353,272.78/530,050.72 = 128,648.85/x
  3. Step 3: Cross multiply
    353,272.78x = 530,050.72 × 128,648.85
  4. Step 4: Simplify right side
    353,272.78x = 68,190,415,569.67
  5. Step 5: Solve for x
    x = 68,190,415,569.67/353,272.78
  6. Step 6: Final answer
    x = 193,024.82

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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.