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Finding the Fourth Proportional to 518,259.05, 715,187.77 and 288,811.29

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Solution

The fourth proportional to 518,259.05, 715,187.77 and 288,811.29 is: 398,554.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,259.05 : 715,187.77 = 288,811.29 : x
  2. Step 2: Convert to fraction form
    518,259.05/715,187.77 = 288,811.29/x
  3. Step 3: Cross multiply
    518,259.05x = 715,187.77 × 288,811.29
  4. Step 4: Simplify right side
    518,259.05x = 206,554,302,445.92
  5. Step 5: Solve for x
    x = 206,554,302,445.92/518,259.05
  6. Step 6: Final answer
    x = 398,554.16

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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.