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Finding the Fourth Proportional to 630,391.66, 869,923.32 and 343,911.70

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Solution

The fourth proportional to 630,391.66, 869,923.32 and 343,911.70 is: 474,588.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,391.66 : 869,923.32 = 343,911.70 : x
  2. Step 2: Convert to fraction form
    630,391.66/869,923.32 = 343,911.70/x
  3. Step 3: Cross multiply
    630,391.66x = 869,923.32 × 343,911.70
  4. Step 4: Simplify right side
    630,391.66x = 299,176,807,850.84
  5. Step 5: Solve for x
    x = 299,176,807,850.84/630,391.66
  6. Step 6: Final answer
    x = 474,588.78

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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.