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Finding the Fourth Proportional to 878,843.76, 1,212,793.56 and 476,427.12

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Solution

The fourth proportional to 878,843.76, 1,212,793.56 and 476,427.12 is: 657,463.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,843.76 : 1,212,793.56 = 476,427.12 : x
  2. Step 2: Convert to fraction form
    878,843.76/1,212,793.56 = 476,427.12/x
  3. Step 3: Cross multiply
    878,843.76x = 1,212,793.56 × 476,427.12
  4. Step 4: Simplify right side
    878,843.76x = 577,807,742,945.35
  5. Step 5: Solve for x
    x = 577,807,742,945.35/878,843.76
  6. Step 6: Final answer
    x = 657,463.56

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Double scale
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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.