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Finding the Fourth Proportional to 516,960.81, 713,398.91 and 287,515.89

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Solution

The fourth proportional to 516,960.81, 713,398.91 and 287,515.89 is: 396,768.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,960.81 : 713,398.91 = 287,515.89 : x
  2. Step 2: Convert to fraction form
    516,960.81/713,398.91 = 287,515.89/x
  3. Step 3: Cross multiply
    516,960.81x = 713,398.91 × 287,515.89
  4. Step 4: Simplify right side
    516,960.81x = 205,113,521,096.10
  5. Step 5: Solve for x
    x = 205,113,521,096.10/516,960.81
  6. Step 6: Final answer
    x = 396,768.03

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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.