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Finding the Fourth Proportional to 355,445.05, 533,260.98 and 127,763.77

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Solution

The fourth proportional to 355,445.05, 533,260.98 and 127,763.77 is: 191,679.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,445.05 : 533,260.98 = 127,763.77 : x
  2. Step 2: Convert to fraction form
    355,445.05/533,260.98 = 127,763.77/x
  3. Step 3: Cross multiply
    355,445.05x = 533,260.98 × 127,763.77
  4. Step 4: Simplify right side
    355,445.05x = 68,131,432,879.29
  5. Step 5: Solve for x
    x = 68,131,432,879.29/355,445.05
  6. Step 6: Final answer
    x = 191,679.23

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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.