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Finding the Fourth Proportional to 554,178.62, 831,009.61 and 287,867.63

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Solution

The fourth proportional to 554,178.62, 831,009.61 and 287,867.63 is: 431,667.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,178.62 : 831,009.61 = 287,867.63 : x
  2. Step 2: Convert to fraction form
    554,178.62/831,009.61 = 287,867.63/x
  3. Step 3: Cross multiply
    554,178.62x = 831,009.61 × 287,867.63
  4. Step 4: Simplify right side
    554,178.62x = 239,220,766,937.92
  5. Step 5: Solve for x
    x = 239,220,766,937.92/554,178.62
  6. Step 6: Final answer
    x = 431,667.26

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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.