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Finding the Fourth Proportional to 878,906.88, 1,212,937.92 and 556,499.52

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Solution

The fourth proportional to 878,906.88, 1,212,937.92 and 556,499.52 is: 767,998.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,906.88 : 1,212,937.92 = 556,499.52 : x
  2. Step 2: Convert to fraction form
    878,906.88/1,212,937.92 = 556,499.52/x
  3. Step 3: Cross multiply
    878,906.88x = 1,212,937.92 × 556,499.52
  4. Step 4: Simplify right side
    878,906.88x = 674,999,370,269.80
  5. Step 5: Solve for x
    x = 674,999,370,269.80/878,906.88
  6. Step 6: Final answer
    x = 767,998.73

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1.5x scale

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.