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Finding the Fourth Proportional to 570,388.05, 787,447.31 and 389,369.79

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Solution

The fourth proportional to 570,388.05, 787,447.31 and 389,369.79 is: 537,543.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,388.05 : 787,447.31 = 389,369.79 : x
  2. Step 2: Convert to fraction form
    570,388.05/787,447.31 = 389,369.79/x
  3. Step 3: Cross multiply
    570,388.05x = 787,447.31 × 389,369.79
  4. Step 4: Simplify right side
    570,388.05x = 306,608,191,783.92
  5. Step 5: Solve for x
    x = 306,608,191,783.92/570,388.05
  6. Step 6: Final answer
    x = 537,543.15

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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.