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Finding the Fourth Proportional to 878,415.24, 1,317,609 and 279,367.74

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Solution

The fourth proportional to 878,415.24, 1,317,609 and 279,367.74 is: 419,047.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,415.24 : 1,317,609 = 279,367.74 : x
  2. Step 2: Convert to fraction form
    878,415.24/1,317,609 = 279,367.74/x
  3. Step 3: Cross multiply
    878,415.24x = 1,317,609 × 279,367.74
  4. Step 4: Simplify right side
    878,415.24x = 368,097,448,533.66
  5. Step 5: Solve for x
    x = 368,097,448,533.66/878,415.24
  6. Step 6: Final answer
    x = 419,047.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.