Home / 429,251.16-643,890.59-215,902.65

Finding the Fourth Proportional to 429,251.16, 643,890.59 and 215,902.65

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Solution

The fourth proportional to 429,251.16, 643,890.59 and 215,902.65 is: 323,860.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,251.16 : 643,890.59 = 215,902.65 : x
  2. Step 2: Convert to fraction form
    429,251.16/643,890.59 = 215,902.65/x
  3. Step 3: Cross multiply
    429,251.16x = 643,890.59 × 215,902.65
  4. Step 4: Simplify right side
    429,251.16x = 139,017,683,611.55
  5. Step 5: Solve for x
    x = 139,017,683,611.55/429,251.16
  6. Step 6: Final answer
    x = 323,860.94

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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.