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Finding the Fourth Proportional to 716,166.38, 988,317.84 and 393,881.86

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Solution

The fourth proportional to 716,166.38, 988,317.84 and 393,881.86 is: 543,561.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,166.38 : 988,317.84 = 393,881.86 : x
  2. Step 2: Convert to fraction form
    716,166.38/988,317.84 = 393,881.86/x
  3. Step 3: Cross multiply
    716,166.38x = 988,317.84 × 393,881.86
  4. Step 4: Simplify right side
    716,166.38x = 389,280,465,689.65
  5. Step 5: Solve for x
    x = 389,280,465,689.65/716,166.38
  6. Step 6: Final answer
    x = 543,561.49

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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.