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Finding the Fourth Proportional to 390,152.48, 585,228.69 and 109,669.73

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Solution

The fourth proportional to 390,152.48, 585,228.69 and 109,669.73 is: 164,504.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,152.48 : 585,228.69 = 109,669.73 : x
  2. Step 2: Convert to fraction form
    390,152.48/585,228.69 = 109,669.73/x
  3. Step 3: Cross multiply
    390,152.48x = 585,228.69 × 109,669.73
  4. Step 4: Simplify right side
    390,152.48x = 64,181,869,494.41
  5. Step 5: Solve for x
    x = 64,181,869,494.41/390,152.48
  6. Step 6: Final answer
    x = 164,504.58

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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.