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Finding the Fourth Proportional to 283,354.40, 391,015.05 and 156,006.20

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Solution

The fourth proportional to 283,354.40, 391,015.05 and 156,006.20 is: 215,280.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,354.40 : 391,015.05 = 156,006.20 : x
  2. Step 2: Convert to fraction form
    283,354.40/391,015.05 = 156,006.20/x
  3. Step 3: Cross multiply
    283,354.40x = 391,015.05 × 156,006.20
  4. Step 4: Simplify right side
    283,354.40x = 61,000,772,485.82
  5. Step 5: Solve for x
    x = 61,000,772,485.82/283,354.40
  6. Step 6: Final answer
    x = 215,280.84

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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.