Home / 521,972.81-720,310.23-307,126.79

Finding the Fourth Proportional to 521,972.81, 720,310.23 and 307,126.79

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Solution

The fourth proportional to 521,972.81, 720,310.23 and 307,126.79 is: 423,827.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,972.81 : 720,310.23 = 307,126.79 : x
  2. Step 2: Convert to fraction form
    521,972.81/720,310.23 = 307,126.79/x
  3. Step 3: Cross multiply
    521,972.81x = 720,310.23 × 307,126.79
  4. Step 4: Simplify right side
    521,972.81x = 221,226,570,544.84
  5. Step 5: Solve for x
    x = 221,226,570,544.84/521,972.81
  6. Step 6: Final answer
    x = 423,827.77

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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.