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Finding the Fourth Proportional to 518,903.38, 716,059.33 and 289,484.65

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Solution

The fourth proportional to 518,903.38, 716,059.33 and 289,484.65 is: 399,473.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,903.38 : 716,059.33 = 289,484.65 : x
  2. Step 2: Convert to fraction form
    518,903.38/716,059.33 = 289,484.65/x
  3. Step 3: Cross multiply
    518,903.38x = 716,059.33 × 289,484.65
  4. Step 4: Simplify right side
    518,903.38x = 207,288,184,524.29
  5. Step 5: Solve for x
    x = 207,288,184,524.29/518,903.38
  6. Step 6: Final answer
    x = 399,473.57

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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.