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Finding the Fourth Proportional to 691,009.38, 953,593.86 and 385,079.06

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Solution

The fourth proportional to 691,009.38, 953,593.86 and 385,079.06 is: 531,409.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,009.38 : 953,593.86 = 385,079.06 : x
  2. Step 2: Convert to fraction form
    691,009.38/953,593.86 = 385,079.06/x
  3. Step 3: Cross multiply
    691,009.38x = 953,593.86 × 385,079.06
  4. Step 4: Simplify right side
    691,009.38x = 367,209,031,058.60
  5. Step 5: Solve for x
    x = 367,209,031,058.60/691,009.38
  6. Step 6: Final answer
    x = 531,409.62

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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.