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Finding the Fourth Proportional to 714,716.69, 986,302.18 and 392,423.95

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Solution

The fourth proportional to 714,716.69, 986,302.18 and 392,423.95 is: 541,541.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,716.69 : 986,302.18 = 392,423.95 : x
  2. Step 2: Convert to fraction form
    714,716.69/986,302.18 = 392,423.95/x
  3. Step 3: Cross multiply
    714,716.69x = 986,302.18 × 392,423.95
  4. Step 4: Simplify right side
    714,716.69x = 387,048,597,369.21
  5. Step 5: Solve for x
    x = 387,048,597,369.21/714,716.69
  6. Step 6: Final answer
    x = 541,541.29

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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.