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Finding the Fourth Proportional to 399,776.04, 551,689.74 and 218,488.05

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Solution

The fourth proportional to 399,776.04, 551,689.74 and 218,488.05 is: 301,512.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,776.04 : 551,689.74 = 218,488.05 : x
  2. Step 2: Convert to fraction form
    399,776.04/551,689.74 = 218,488.05/x
  3. Step 3: Cross multiply
    399,776.04x = 551,689.74 × 218,488.05
  4. Step 4: Simplify right side
    399,776.04x = 120,537,615,497.61
  5. Step 5: Solve for x
    x = 120,537,615,497.61/399,776.04
  6. Step 6: Final answer
    x = 301,512.86

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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.