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Finding the Fourth Proportional to 261,690.56, 392,534.88 and 64,698.56

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Solution

The fourth proportional to 261,690.56, 392,534.88 and 64,698.56 is: 97,047.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,690.56 : 392,534.88 = 64,698.56 : x
  2. Step 2: Convert to fraction form
    261,690.56/392,534.88 = 64,698.56/x
  3. Step 3: Cross multiply
    261,690.56x = 392,534.88 × 64,698.56
  4. Step 4: Simplify right side
    261,690.56x = 25,396,441,485.77
  5. Step 5: Solve for x
    x = 25,396,441,485.77/261,690.56
  6. Step 6: Final answer
    x = 97,047.60

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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.