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Finding the Fourth Proportional to 497,989.51, 687,227.69 and 271,639.87

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Solution

The fourth proportional to 497,989.51, 687,227.69 and 271,639.87 is: 374,864.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    497,989.51 : 687,227.69 = 271,639.87 : x
  2. Step 2: Convert to fraction form
    497,989.51/687,227.69 = 271,639.87/x
  3. Step 3: Cross multiply
    497,989.51x = 687,227.69 × 271,639.87
  4. Step 4: Simplify right side
    497,989.51x = 186,678,439,333.03
  5. Step 5: Solve for x
    x = 186,678,439,333.03/497,989.51
  6. Step 6: Final answer
    x = 374,864.20

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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.