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Finding the Fourth Proportional to 261,322.60, 391,206.30 and 156,087.40

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Solution

The fourth proportional to 261,322.60, 391,206.30 and 156,087.40 is: 233,666.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,322.60 : 391,206.30 = 156,087.40 : x
  2. Step 2: Convert to fraction form
    261,322.60/391,206.30 = 156,087.40/x
  3. Step 3: Cross multiply
    261,322.60x = 391,206.30 × 156,087.40
  4. Step 4: Simplify right side
    261,322.60x = 61,062,374,230.62
  5. Step 5: Solve for x
    x = 61,062,374,230.62/261,322.60
  6. Step 6: Final answer
    x = 233,666.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.