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Finding the Fourth Proportional to 551,489.88, 761,056.43 and 309,772.58

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Solution

The fourth proportional to 551,489.88, 761,056.43 and 309,772.58 is: 427,486.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,489.88 : 761,056.43 = 309,772.58 : x
  2. Step 2: Convert to fraction form
    551,489.88/761,056.43 = 309,772.58/x
  3. Step 3: Cross multiply
    551,489.88x = 761,056.43 × 309,772.58
  4. Step 4: Simplify right side
    551,489.88x = 235,754,413,846.69
  5. Step 5: Solve for x
    x = 235,754,413,846.69/551,489.88
  6. Step 6: Final answer
    x = 427,486.38

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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.