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Finding the Fourth Proportional to 312,341.60, 431,026.20 and 169,100.48

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Solution

The fourth proportional to 312,341.60, 431,026.20 and 169,100.48 is: 233,355.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,341.60 : 431,026.20 = 169,100.48 : x
  2. Step 2: Convert to fraction form
    312,341.60/431,026.20 = 169,100.48/x
  3. Step 3: Cross multiply
    312,341.60x = 431,026.20 × 169,100.48
  4. Step 4: Simplify right side
    312,341.60x = 72,886,737,312.58
  5. Step 5: Solve for x
    x = 72,886,737,312.58/312,341.60
  6. Step 6: Final answer
    x = 233,355.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.