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Finding the Fourth Proportional to 320,069.61, 480,405.78 and 162,411.21

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Solution

The fourth proportional to 320,069.61, 480,405.78 and 162,411.21 is: 243,769.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,069.61 : 480,405.78 = 162,411.21 : x
  2. Step 2: Convert to fraction form
    320,069.61/480,405.78 = 162,411.21/x
  3. Step 3: Cross multiply
    320,069.61x = 480,405.78 × 162,411.21
  4. Step 4: Simplify right side
    320,069.61x = 78,023,284,020.79
  5. Step 5: Solve for x
    x = 78,023,284,020.79/320,069.61
  6. Step 6: Final answer
    x = 243,769.74

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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.