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Finding the Fourth Proportional to 261,611.60, 392,417.40 and 243,896.90

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Solution

The fourth proportional to 261,611.60, 392,417.40 and 243,896.90 is: 365,845.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,611.60 : 392,417.40 = 243,896.90 : x
  2. Step 2: Convert to fraction form
    261,611.60/392,417.40 = 243,896.90/x
  3. Step 3: Cross multiply
    261,611.60x = 392,417.40 × 243,896.90
  4. Step 4: Simplify right side
    261,611.60x = 95,709,387,366.06
  5. Step 5: Solve for x
    x = 95,709,387,366.06/261,611.60
  6. Step 6: Final answer
    x = 365,845.35

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Similar ratio
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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.