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Finding the Fourth Proportional to 313,330.80, 469,996.20 and 76,670.40

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Solution

The fourth proportional to 313,330.80, 469,996.20 and 76,670.40 is: 115,005.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,330.80 : 469,996.20 = 76,670.40 : x
  2. Step 2: Convert to fraction form
    313,330.80/469,996.20 = 76,670.40/x
  3. Step 3: Cross multiply
    313,330.80x = 469,996.20 × 76,670.40
  4. Step 4: Simplify right side
    313,330.80x = 36,034,796,652.48
  5. Step 5: Solve for x
    x = 36,034,796,652.48/313,330.80
  6. Step 6: Final answer
    x = 115,005.60

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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.