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Finding the Fourth Proportional to 505,585.12, 697,702.80 and 279,233.44

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Solution

The fourth proportional to 505,585.12, 697,702.80 and 279,233.44 is: 385,339.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,585.12 : 697,702.80 = 279,233.44 : x
  2. Step 2: Convert to fraction form
    505,585.12/697,702.80 = 279,233.44/x
  3. Step 3: Cross multiply
    505,585.12x = 697,702.80 × 279,233.44
  4. Step 4: Simplify right side
    505,585.12x = 194,821,952,941.63
  5. Step 5: Solve for x
    x = 194,821,952,941.63/505,585.12
  6. Step 6: Final answer
    x = 385,339.57

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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.