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Finding the Fourth Proportional to 319,368.18, 479,251.71 and 212,826.90

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Solution

The fourth proportional to 319,368.18, 479,251.71 and 212,826.90 is: 319,373.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,368.18 : 479,251.71 = 212,826.90 : x
  2. Step 2: Convert to fraction form
    319,368.18/479,251.71 = 212,826.90/x
  3. Step 3: Cross multiply
    319,368.18x = 479,251.71 × 212,826.90
  4. Step 4: Simplify right side
    319,368.18x = 101,997,655,759.00
  5. Step 5: Solve for x
    x = 101,997,655,759.00/319,368.18
  6. Step 6: Final answer
    x = 319,373.26

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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.