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Finding the Fourth Proportional to 399,688.32, 551,328.54 and 263,673.96

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Solution

The fourth proportional to 399,688.32, 551,328.54 and 263,673.96 is: 363,710.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,688.32 : 551,328.54 = 263,673.96 : x
  2. Step 2: Convert to fraction form
    399,688.32/551,328.54 = 263,673.96/x
  3. Step 3: Cross multiply
    399,688.32x = 551,328.54 × 263,673.96
  4. Step 4: Simplify right side
    399,688.32x = 145,370,979,402.82
  5. Step 5: Solve for x
    x = 145,370,979,402.82/399,688.32
  6. Step 6: Final answer
    x = 363,710.85

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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.