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Finding the Fourth Proportional to 639,356.30, 958,688.85 and 265,417.10

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Solution

The fourth proportional to 639,356.30, 958,688.85 and 265,417.10 is: 397,982.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,356.30 : 958,688.85 = 265,417.10 : x
  2. Step 2: Convert to fraction form
    639,356.30/958,688.85 = 265,417.10/x
  3. Step 3: Cross multiply
    639,356.30x = 958,688.85 × 265,417.10
  4. Step 4: Simplify right side
    639,356.30x = 254,452,414,369.34
  5. Step 5: Solve for x
    x = 254,452,414,369.34/639,356.30
  6. Step 6: Final answer
    x = 397,982.18

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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.