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Finding the Fourth Proportional to 638,024.80, 955,856.40 and 371,912.80

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Solution

The fourth proportional to 638,024.80, 955,856.40 and 371,912.80 is: 557,180.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,024.80 : 955,856.40 = 371,912.80 : x
  2. Step 2: Convert to fraction form
    638,024.80/955,856.40 = 371,912.80/x
  3. Step 3: Cross multiply
    638,024.80x = 955,856.40 × 371,912.80
  4. Step 4: Simplify right side
    638,024.80x = 355,495,230,121.92
  5. Step 5: Solve for x
    x = 355,495,230,121.92/638,024.80
  6. Step 6: Final answer
    x = 557,180.90

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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.