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Finding the Fourth Proportional to 390,493.21, 585,752.70 and 134,323.21

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Solution

The fourth proportional to 390,493.21, 585,752.70 and 134,323.21 is: 201,489.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,493.21 : 585,752.70 = 134,323.21 : x
  2. Step 2: Convert to fraction form
    390,493.21/585,752.70 = 134,323.21/x
  3. Step 3: Cross multiply
    390,493.21x = 585,752.70 × 134,323.21
  4. Step 4: Simplify right side
    390,493.21x = 78,680,179,329.79
  5. Step 5: Solve for x
    x = 78,680,179,329.79/390,493.21
  6. Step 6: Final answer
    x = 201,489.24

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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.