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Finding the Fourth Proportional to 666,145.76, 999,109.20 and 286,963.64

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Solution

The fourth proportional to 666,145.76, 999,109.20 and 286,963.64 is: 430,398.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,145.76 : 999,109.20 = 286,963.64 : x
  2. Step 2: Convert to fraction form
    666,145.76/999,109.20 = 286,963.64/x
  3. Step 3: Cross multiply
    666,145.76x = 999,109.20 × 286,963.64
  4. Step 4: Simplify right side
    666,145.76x = 286,708,012,789.49
  5. Step 5: Solve for x
    x = 286,708,012,789.49/666,145.76
  6. Step 6: Final answer
    x = 430,398.32

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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.