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Finding the Fourth Proportional to 567,991.64, 783,831.12 and 313,342.76

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Solution

The fourth proportional to 567,991.64, 783,831.12 and 313,342.76 is: 432,414.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    567,991.64 : 783,831.12 = 313,342.76 : x
  2. Step 2: Convert to fraction form
    567,991.64/783,831.12 = 313,342.76/x
  3. Step 3: Cross multiply
    567,991.64x = 783,831.12 × 313,342.76
  4. Step 4: Simplify right side
    567,991.64x = 245,607,806,514.69
  5. Step 5: Solve for x
    x = 245,607,806,514.69/567,991.64
  6. Step 6: Final answer
    x = 432,414.47

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Double scale
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Similar ratio
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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.