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Finding the Fourth Proportional to 312,681.02, 431,341.34 and 197,766.14

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Solution

The fourth proportional to 312,681.02, 431,341.34 and 197,766.14 is: 272,817.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,681.02 : 431,341.34 = 197,766.14 : x
  2. Step 2: Convert to fraction form
    312,681.02/431,341.34 = 197,766.14/x
  3. Step 3: Cross multiply
    312,681.02x = 431,341.34 × 197,766.14
  4. Step 4: Simplify right side
    312,681.02x = 85,304,708,688.69
  5. Step 5: Solve for x
    x = 85,304,708,688.69/312,681.02
  6. Step 6: Final answer
    x = 272,817.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.