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Finding the Fourth Proportional to 207,921.90, 291,681.15 and 207,921.90

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Solution

The fourth proportional to 207,921.90, 291,681.15 and 207,921.90 is: 291,681.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,921.90 : 291,681.15 = 207,921.90 : x
  2. Step 2: Convert to fraction form
    207,921.90/291,681.15 = 207,921.90/x
  3. Step 3: Cross multiply
    207,921.90x = 291,681.15 × 207,921.90
  4. Step 4: Simplify right side
    207,921.90x = 60,646,898,902.19
  5. Step 5: Solve for x
    x = 60,646,898,902.19/207,921.90
  6. Step 6: Final answer
    x = 291,681.15

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.