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Finding the Fourth Proportional to 878,908.88, 1,212,940.68 and 556,501.52

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Solution

The fourth proportional to 878,908.88, 1,212,940.68 and 556,501.52 is: 768,001.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,908.88 : 1,212,940.68 = 556,501.52 : x
  2. Step 2: Convert to fraction form
    878,908.88/1,212,940.68 = 556,501.52/x
  3. Step 3: Cross multiply
    878,908.88x = 1,212,940.68 × 556,501.52
  4. Step 4: Simplify right side
    878,908.88x = 675,003,332,089.83
  5. Step 5: Solve for x
    x = 675,003,332,089.83/878,908.88
  6. Step 6: Final answer
    x = 768,001.49

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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.