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Finding the Fourth Proportional to 695,564.64, 959,915.16 and 389,623.14

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Solution

The fourth proportional to 695,564.64, 959,915.16 and 389,623.14 is: 537,700.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,564.64 : 959,915.16 = 389,623.14 : x
  2. Step 2: Convert to fraction form
    695,564.64/959,915.16 = 389,623.14/x
  3. Step 3: Cross multiply
    695,564.64x = 959,915.16 × 389,623.14
  4. Step 4: Simplify right side
    695,564.64x = 374,005,158,772.80
  5. Step 5: Solve for x
    x = 374,005,158,772.80/695,564.64
  6. Step 6: Final answer
    x = 537,700.07

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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.