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Finding the Fourth Proportional to 320,419.27, 480,734.13 and 131,038.91

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Solution

The fourth proportional to 320,419.27, 480,734.13 and 131,038.91 is: 196,601.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,419.27 : 480,734.13 = 131,038.91 : x
  2. Step 2: Convert to fraction form
    320,419.27/480,734.13 = 131,038.91/x
  3. Step 3: Cross multiply
    320,419.27x = 480,734.13 × 131,038.91
  4. Step 4: Simplify right side
    320,419.27x = 62,994,875,364.11
  5. Step 5: Solve for x
    x = 62,994,875,364.11/320,419.27
  6. Step 6: Final answer
    x = 196,601.39

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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.