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Finding the Fourth Proportional to 386,590.42, 579,925.44 and 133,870.42

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Solution

The fourth proportional to 386,590.42, 579,925.44 and 133,870.42 is: 200,819.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,590.42 : 579,925.44 = 133,870.42 : x
  2. Step 2: Convert to fraction form
    386,590.42/579,925.44 = 133,870.42/x
  3. Step 3: Cross multiply
    386,590.42x = 579,925.44 × 133,870.42
  4. Step 4: Simplify right side
    386,590.42x = 77,634,862,221.48
  5. Step 5: Solve for x
    x = 77,634,862,221.48/386,590.42
  6. Step 6: Final answer
    x = 200,819.42

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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.