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Finding the Fourth Proportional to 386,168.58, 579,330.90 and 133,458.30

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Solution

The fourth proportional to 386,168.58, 579,330.90 and 133,458.30 is: 200,214.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,168.58 : 579,330.90 = 133,458.30 : x
  2. Step 2: Convert to fraction form
    386,168.58/579,330.90 = 133,458.30/x
  3. Step 3: Cross multiply
    386,168.58x = 579,330.90 × 133,458.30
  4. Step 4: Simplify right side
    386,168.58x = 77,316,517,051.47
  5. Step 5: Solve for x
    x = 77,316,517,051.47/386,168.58
  6. Step 6: Final answer
    x = 200,214.42

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1.5x scale

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.