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Finding the Fourth Proportional to 518,679.39, 715,749.93 and 289,260.24

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Solution

The fourth proportional to 518,679.39, 715,749.93 and 289,260.24 is: 399,163.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,679.39 : 715,749.93 = 289,260.24 : x
  2. Step 2: Convert to fraction form
    518,679.39/715,749.93 = 289,260.24/x
  3. Step 3: Cross multiply
    518,679.39x = 715,749.93 × 289,260.24
  4. Step 4: Simplify right side
    518,679.39x = 207,037,996,531.78
  5. Step 5: Solve for x
    x = 207,037,996,531.78/518,679.39
  6. Step 6: Final answer
    x = 399,163.72

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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.