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Finding the Fourth Proportional to 399,325.29, 551,071.59 and 218,038.49

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Solution

The fourth proportional to 399,325.29, 551,071.59 and 218,038.49 is: 300,894.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,325.29 : 551,071.59 = 218,038.49 : x
  2. Step 2: Convert to fraction form
    399,325.29/551,071.59 = 218,038.49/x
  3. Step 3: Cross multiply
    399,325.29x = 551,071.59 × 218,038.49
  4. Step 4: Simplify right side
    399,325.29x = 120,154,814,610.14
  5. Step 5: Solve for x
    x = 120,154,814,610.14/399,325.29
  6. Step 6: Final answer
    x = 300,894.58

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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.