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Finding the Fourth Proportional to 386,598.15, 579,878.37 and 143,486.53

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Solution

The fourth proportional to 386,598.15, 579,878.37 and 143,486.53 is: 215,222.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,598.15 : 579,878.37 = 143,486.53 : x
  2. Step 2: Convert to fraction form
    386,598.15/579,878.37 = 143,486.53/x
  3. Step 3: Cross multiply
    386,598.15x = 579,878.37 × 143,486.53
  4. Step 4: Simplify right side
    386,598.15x = 83,204,733,145.59
  5. Step 5: Solve for x
    x = 83,204,733,145.59/386,598.15
  6. Step 6: Final answer
    x = 215,222.79

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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.