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Finding the Fourth Proportional to 878,903.60, 1,212,896.30 and 516,342.56

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Solution

The fourth proportional to 878,903.60, 1,212,896.30 and 516,342.56 is: 712,558.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,903.60 : 1,212,896.30 = 516,342.56 : x
  2. Step 2: Convert to fraction form
    878,903.60/1,212,896.30 = 516,342.56/x
  3. Step 3: Cross multiply
    878,903.60x = 1,212,896.30 × 516,342.56
  4. Step 4: Simplify right side
    878,903.60x = 626,269,980,556.53
  5. Step 5: Solve for x
    x = 626,269,980,556.53/878,903.60
  6. Step 6: Final answer
    x = 712,558.22

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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.