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Finding the Fourth Proportional to 553,637.61, 764,019.87 and 298,988.78

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Solution

The fourth proportional to 553,637.61, 764,019.87 and 298,988.78 is: 412,604.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,637.61 : 764,019.87 = 298,988.78 : x
  2. Step 2: Convert to fraction form
    553,637.61/764,019.87 = 298,988.78/x
  3. Step 3: Cross multiply
    553,637.61x = 764,019.87 × 298,988.78
  4. Step 4: Simplify right side
    553,637.61x = 228,433,365,006.96
  5. Step 5: Solve for x
    x = 228,433,365,006.96/553,637.61
  6. Step 6: Final answer
    x = 412,604.49

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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.