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Finding the Fourth Proportional to 518,658.05, 715,745.06 and 289,218.06

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Solution

The fourth proportional to 518,658.05, 715,745.06 and 289,218.06 is: 399,119.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,658.05 : 715,745.06 = 289,218.06 : x
  2. Step 2: Convert to fraction form
    518,658.05/715,745.06 = 289,218.06/x
  3. Step 3: Cross multiply
    518,658.05x = 715,745.06 × 289,218.06
  4. Step 4: Simplify right side
    518,658.05x = 207,006,397,346.26
  5. Step 5: Solve for x
    x = 207,006,397,346.26/518,658.05
  6. Step 6: Final answer
    x = 399,119.22

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1.5x scale

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.