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Finding the Fourth Proportional to 343,774.77, 515,134.71 and 143,985.84

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Solution

The fourth proportional to 343,774.77, 515,134.71 and 143,985.84 is: 215,757.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,774.77 : 515,134.71 = 143,985.84 : x
  2. Step 2: Convert to fraction form
    343,774.77/515,134.71 = 143,985.84/x
  3. Step 3: Cross multiply
    343,774.77x = 515,134.71 × 143,985.84
  4. Step 4: Simplify right side
    343,774.77x = 74,172,103,932.51
  5. Step 5: Solve for x
    x = 74,172,103,932.51/343,774.77
  6. Step 6: Final answer
    x = 215,757.85

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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.