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Finding the Fourth Proportional to 387,330.66, 580,995.45 and 134,611.14

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Solution

The fourth proportional to 387,330.66, 580,995.45 and 134,611.14 is: 201,916.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,330.66 : 580,995.45 = 134,611.14 : x
  2. Step 2: Convert to fraction form
    387,330.66/580,995.45 = 134,611.14/x
  3. Step 3: Cross multiply
    387,330.66x = 580,995.45 × 134,611.14
  4. Step 4: Simplify right side
    387,330.66x = 78,208,459,859.31
  5. Step 5: Solve for x
    x = 78,208,459,859.31/387,330.66
  6. Step 6: Final answer
    x = 201,916.52

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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.