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Finding the Fourth Proportional to 399,703.76, 551,592.66 and 218,415.72

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Solution

The fourth proportional to 399,703.76, 551,592.66 and 218,415.72 is: 301,414.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,703.76 : 551,592.66 = 218,415.72 : x
  2. Step 2: Convert to fraction form
    399,703.76/551,592.66 = 218,415.72/x
  3. Step 3: Cross multiply
    399,703.76x = 551,592.66 × 218,415.72
  4. Step 4: Simplify right side
    399,703.76x = 120,476,506,946.38
  5. Step 5: Solve for x
    x = 120,476,506,946.38/399,703.76
  6. Step 6: Final answer
    x = 301,414.49

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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.