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Finding the Fourth Proportional to 518,575.36, 715,629.76 and 289,129.92

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Solution

The fourth proportional to 518,575.36, 715,629.76 and 289,129.92 is: 398,996.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,575.36 : 715,629.76 = 289,129.92 : x
  2. Step 2: Convert to fraction form
    518,575.36/715,629.76 = 289,129.92/x
  3. Step 3: Cross multiply
    518,575.36x = 715,629.76 × 289,129.92
  4. Step 4: Simplify right side
    518,575.36x = 206,909,975,258.42
  5. Step 5: Solve for x
    x = 206,909,975,258.42/518,575.36
  6. Step 6: Final answer
    x = 398,996.93

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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.