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Finding the Third Proportional to 251,871.75 and 390,007.13

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Solution

The third proportional to 251,871.75 and 390,007.13 is: 603,900.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,871.75 : 390,007.13 = 390,007.13 : x
  2. Step 2: Convert to fraction form
    251,871.75/390,007.13 = 390,007.13/x
  3. Step 3: Cross multiply
    251,871.75x = 390,007.13 × 390,007.13
  4. Step 4: Simplify right side
    251,871.75x = 152,105,557,550.77
  5. Step 5: Solve for x
    x = 152,105,557,550.77/251,871.75
  6. Step 6: Final answer
    x = 603,900.82

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.