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Finding the Fourth Proportional to 426,853.11, 640,192.18 and 156,888.21

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Solution

The fourth proportional to 426,853.11, 640,192.18 and 156,888.21 is: 235,300.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,853.11 : 640,192.18 = 156,888.21 : x
  2. Step 2: Convert to fraction form
    426,853.11/640,192.18 = 156,888.21/x
  3. Step 3: Cross multiply
    426,853.11x = 640,192.18 × 156,888.21
  4. Step 4: Simplify right side
    426,853.11x = 100,438,605,176.20
  5. Step 5: Solve for x
    x = 100,438,605,176.20/426,853.11
  6. Step 6: Final answer
    x = 235,300.16

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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.