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Finding the Fourth Proportional to 518,370.67, 715,287.81 and 288,871.75

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Solution

The fourth proportional to 518,370.67, 715,287.81 and 288,871.75 is: 398,607.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,370.67 : 715,287.81 = 288,871.75 : x
  2. Step 2: Convert to fraction form
    518,370.67/715,287.81 = 288,871.75/x
  3. Step 3: Cross multiply
    518,370.67x = 715,287.81 × 288,871.75
  4. Step 4: Simplify right side
    518,370.67x = 206,626,441,428.37
  5. Step 5: Solve for x
    x = 206,626,441,428.37/518,370.67
  6. Step 6: Final answer
    x = 398,607.51

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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.