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Finding the Fourth Proportional to 512,885.79, 707,768.55 and 286,531.29

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Solution

The fourth proportional to 512,885.79, 707,768.55 and 286,531.29 is: 395,405.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,885.79 : 707,768.55 = 286,531.29 : x
  2. Step 2: Convert to fraction form
    512,885.79/707,768.55 = 286,531.29/x
  3. Step 3: Cross multiply
    512,885.79x = 707,768.55 × 286,531.29
  4. Step 4: Simplify right side
    512,885.79x = 202,797,835,652.93
  5. Step 5: Solve for x
    x = 202,797,835,652.93/512,885.79
  6. Step 6: Final answer
    x = 395,405.45

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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.