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Finding the Fourth Proportional to 536,831.40, 805,247.10 and 287,999.40

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Solution

The fourth proportional to 536,831.40, 805,247.10 and 287,999.40 is: 431,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    536,831.40 : 805,247.10 = 287,999.40 : x
  2. Step 2: Convert to fraction form
    536,831.40/805,247.10 = 287,999.40/x
  3. Step 3: Cross multiply
    536,831.40x = 805,247.10 × 287,999.40
  4. Step 4: Simplify right side
    536,831.40x = 231,910,681,651.74
  5. Step 5: Solve for x
    x = 231,910,681,651.74/536,831.40
  6. Step 6: Final answer
    x = 431,999.10

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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.