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Finding the Fourth Proportional to 714,288.26, 985,714.70 and 392,003.57

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Solution

The fourth proportional to 714,288.26, 985,714.70 and 392,003.57 is: 540,963.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,288.26 : 985,714.70 = 392,003.57 : x
  2. Step 2: Convert to fraction form
    714,288.26/985,714.70 = 392,003.57/x
  3. Step 3: Cross multiply
    714,288.26x = 985,714.70 × 392,003.57
  4. Step 4: Simplify right side
    714,288.26x = 386,403,674,512.89
  5. Step 5: Solve for x
    x = 386,403,674,512.89/714,288.26
  6. Step 6: Final answer
    x = 540,963.22

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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.