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Finding the Fourth Proportional to 714,286.76, 985,712.63 and 392,002.07

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Solution

The fourth proportional to 714,286.76, 985,712.63 and 392,002.07 is: 540,961.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,286.76 : 985,712.63 = 392,002.07 : x
  2. Step 2: Convert to fraction form
    714,286.76/985,712.63 = 392,002.07/x
  3. Step 3: Cross multiply
    714,286.76x = 985,712.63 × 392,002.07
  4. Step 4: Simplify right side
    714,286.76x = 386,401,384,496.57
  5. Step 5: Solve for x
    x = 386,401,384,496.57/714,286.76
  6. Step 6: Final answer
    x = 540,961.15

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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.