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Finding the Fourth Proportional to 390,120.66, 584,800.20 and 190,432.98

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Solution

The fourth proportional to 390,120.66, 584,800.20 and 190,432.98 is: 285,463.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,120.66 : 584,800.20 = 190,432.98 : x
  2. Step 2: Convert to fraction form
    390,120.66/584,800.20 = 190,432.98/x
  3. Step 3: Cross multiply
    390,120.66x = 584,800.20 × 190,432.98
  4. Step 4: Simplify right side
    390,120.66x = 111,365,244,790.60
  5. Step 5: Solve for x
    x = 111,365,244,790.60/390,120.66
  6. Step 6: Final answer
    x = 285,463.59

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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.