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Finding the Fourth Proportional to 878,419.28, 1,212,219 and 476,011.28

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Solution

The fourth proportional to 878,419.28, 1,212,219 and 476,011.28 is: 656,895.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,419.28 : 1,212,219 = 476,011.28 : x
  2. Step 2: Convert to fraction form
    878,419.28/1,212,219 = 476,011.28/x
  3. Step 3: Cross multiply
    878,419.28x = 1,212,219 × 476,011.28
  4. Step 4: Simplify right side
    878,419.28x = 577,029,917,830.32
  5. Step 5: Solve for x
    x = 577,029,917,830.32/878,419.28
  6. Step 6: Final answer
    x = 656,895.78

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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.