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Finding the Fourth Proportional to 665,417.40, 998,255.70 and 192,118.20

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Solution

The fourth proportional to 665,417.40, 998,255.70 and 192,118.20 is: 288,214.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,417.40 : 998,255.70 = 192,118.20 : x
  2. Step 2: Convert to fraction form
    665,417.40/998,255.70 = 192,118.20/x
  3. Step 3: Cross multiply
    665,417.40x = 998,255.70 × 192,118.20
  4. Step 4: Simplify right side
    665,417.40x = 191,783,088,223.74
  5. Step 5: Solve for x
    x = 191,783,088,223.74/665,417.40
  6. Step 6: Final answer
    x = 288,214.72

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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.