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Finding the Fourth Proportional to 515,293.66, 711,112.62 and 311,316.22

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Solution

The fourth proportional to 515,293.66, 711,112.62 and 311,316.22 is: 429,620.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,293.66 : 711,112.62 = 311,316.22 : x
  2. Step 2: Convert to fraction form
    515,293.66/711,112.62 = 311,316.22/x
  3. Step 3: Cross multiply
    515,293.66x = 711,112.62 × 311,316.22
  4. Step 4: Simplify right side
    515,293.66x = 221,380,892,852.70
  5. Step 5: Solve for x
    x = 221,380,892,852.70/515,293.66
  6. Step 6: Final answer
    x = 429,620.84

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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.