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Finding the Fourth Proportional to 283,720.58, 391,534.30 and 156,398.30

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Solution

The fourth proportional to 283,720.58, 391,534.30 and 156,398.30 is: 215,829.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,720.58 : 391,534.30 = 156,398.30 : x
  2. Step 2: Convert to fraction form
    283,720.58/391,534.30 = 156,398.30/x
  3. Step 3: Cross multiply
    283,720.58x = 391,534.30 × 156,398.30
  4. Step 4: Simplify right side
    283,720.58x = 61,235,298,911.69
  5. Step 5: Solve for x
    x = 61,235,298,911.69/283,720.58
  6. Step 6: Final answer
    x = 215,829.60

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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.