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Finding the Fourth Proportional to 621,143.20, 931,801.20 and 266,154.40

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Solution

The fourth proportional to 621,143.20, 931,801.20 and 266,154.40 is: 399,268.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,143.20 : 931,801.20 = 266,154.40 : x
  2. Step 2: Convert to fraction form
    621,143.20/931,801.20 = 266,154.40/x
  3. Step 3: Cross multiply
    621,143.20x = 931,801.20 × 266,154.40
  4. Step 4: Simplify right side
    621,143.20x = 248,002,989,305.28
  5. Step 5: Solve for x
    x = 248,002,989,305.28/621,143.20
  6. Step 6: Final answer
    x = 399,268.62

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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.