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Finding the Fourth Proportional to 292,708.80, 439,063.20 and 115,221.60

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Solution

The fourth proportional to 292,708.80, 439,063.20 and 115,221.60 is: 172,832.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,708.80 : 439,063.20 = 115,221.60 : x
  2. Step 2: Convert to fraction form
    292,708.80/439,063.20 = 115,221.60/x
  3. Step 3: Cross multiply
    292,708.80x = 439,063.20 × 115,221.60
  4. Step 4: Simplify right side
    292,708.80x = 50,589,564,405.12
  5. Step 5: Solve for x
    x = 50,589,564,405.12/292,708.80
  6. Step 6: Final answer
    x = 172,832.40

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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.