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Finding the Fourth Proportional to 518,930.82, 716,157.59 and 289,522.71

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Solution

The fourth proportional to 518,930.82, 716,157.59 and 289,522.71 is: 399,559.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,930.82 : 716,157.59 = 289,522.71 : x
  2. Step 2: Convert to fraction form
    518,930.82/716,157.59 = 289,522.71/x
  3. Step 3: Cross multiply
    518,930.82x = 716,157.59 × 289,522.71
  4. Step 4: Simplify right side
    518,930.82x = 207,343,884,796.26
  5. Step 5: Solve for x
    x = 207,343,884,796.26/518,930.82
  6. Step 6: Final answer
    x = 399,559.78

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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.