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Finding the Fourth Proportional to 569,712.38, 786,171.15 and 311,538.11

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Solution

The fourth proportional to 569,712.38, 786,171.15 and 311,538.11 is: 429,905.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    569,712.38 : 786,171.15 = 311,538.11 : x
  2. Step 2: Convert to fraction form
    569,712.38/786,171.15 = 311,538.11/x
  3. Step 3: Cross multiply
    569,712.38x = 786,171.15 × 311,538.11
  4. Step 4: Simplify right side
    569,712.38x = 244,922,270,276.67
  5. Step 5: Solve for x
    x = 244,922,270,276.67/569,712.38
  6. Step 6: Final answer
    x = 429,905.13

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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.