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Finding the Fourth Proportional to 714,314.70, 985,723.43 and 392,030.28

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Solution

The fourth proportional to 714,314.70, 985,723.43 and 392,030.28 is: 540,984.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,314.70 : 985,723.43 = 392,030.28 : x
  2. Step 2: Convert to fraction form
    714,314.70/985,723.43 = 392,030.28/x
  3. Step 3: Cross multiply
    714,314.70x = 985,723.43 × 392,030.28
  4. Step 4: Simplify right side
    714,314.70x = 386,433,430,305.31
  5. Step 5: Solve for x
    x = 386,433,430,305.31/714,314.70
  6. Step 6: Final answer
    x = 540,984.85

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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.