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Finding the Fourth Proportional to 836,825.68, 1,155,375.56 and 642,887.96

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Solution

The fourth proportional to 836,825.68, 1,155,375.56 and 642,887.96 is: 887,612.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    836,825.68 : 1,155,375.56 = 642,887.96 : x
  2. Step 2: Convert to fraction form
    836,825.68/1,155,375.56 = 642,887.96/x
  3. Step 3: Cross multiply
    836,825.68x = 1,155,375.56 × 642,887.96
  4. Step 4: Simplify right side
    836,825.68x = 742,777,036,802.26
  5. Step 5: Solve for x
    x = 742,777,036,802.26/836,825.68
  6. Step 6: Final answer
    x = 887,612.62

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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.