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Finding the Fourth Proportional to 714,667.34, 986,242.86 and 392,398.31

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Solution

The fourth proportional to 714,667.34, 986,242.86 and 392,398.31 is: 541,510.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,667.34 : 986,242.86 = 392,398.31 : x
  2. Step 2: Convert to fraction form
    714,667.34/986,242.86 = 392,398.31/x
  3. Step 3: Cross multiply
    714,667.34x = 986,242.86 × 392,398.31
  4. Step 4: Simplify right side
    714,667.34x = 387,000,033,979.17
  5. Step 5: Solve for x
    x = 387,000,033,979.17/714,667.34
  6. Step 6: Final answer
    x = 541,510.73

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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.