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Finding the Fourth Proportional to 399,491.53, 551,295.02 and 218,203.58

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Solution

The fourth proportional to 399,491.53, 551,295.02 and 218,203.58 is: 301,119.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,491.53 : 551,295.02 = 218,203.58 : x
  2. Step 2: Convert to fraction form
    399,491.53/551,295.02 = 218,203.58/x
  3. Step 3: Cross multiply
    399,491.53x = 551,295.02 × 218,203.58
  4. Step 4: Simplify right side
    399,491.53x = 120,294,547,000.17
  5. Step 5: Solve for x
    x = 120,294,547,000.17/399,491.53
  6. Step 6: Final answer
    x = 301,119.14

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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.