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Finding the Fourth Proportional to 285,410.67, 393,864.96 and 156,350.40

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Solution

The fourth proportional to 285,410.67, 393,864.96 and 156,350.40 is: 215,762.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,410.67 : 393,864.96 = 156,350.40 : x
  2. Step 2: Convert to fraction form
    285,410.67/393,864.96 = 156,350.40/x
  3. Step 3: Cross multiply
    285,410.67x = 393,864.96 × 156,350.40
  4. Step 4: Simplify right side
    285,410.67x = 61,580,944,041.98
  5. Step 5: Solve for x
    x = 61,580,944,041.98/285,410.67
  6. Step 6: Final answer
    x = 215,762.59

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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.