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Finding the Fourth Proportional to 617,307.66, 851,596.85 and 399,586.58

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Solution

The fourth proportional to 617,307.66, 851,596.85 and 399,586.58 is: 551,243.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,307.66 : 851,596.85 = 399,586.58 : x
  2. Step 2: Convert to fraction form
    617,307.66/851,596.85 = 399,586.58/x
  3. Step 3: Cross multiply
    617,307.66x = 851,596.85 × 399,586.58
  4. Step 4: Simplify right side
    617,307.66x = 340,286,669,571.26
  5. Step 5: Solve for x
    x = 340,286,669,571.26/617,307.66
  6. Step 6: Final answer
    x = 551,243.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.