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Finding the Fourth Proportional to 714,715.69, 986,300.80 and 392,422.95

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Solution

The fourth proportional to 714,715.69, 986,300.80 and 392,422.95 is: 541,539.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,715.69 : 986,300.80 = 392,422.95 : x
  2. Step 2: Convert to fraction form
    714,715.69/986,300.80 = 392,422.95/x
  3. Step 3: Cross multiply
    714,715.69x = 986,300.80 × 392,422.95
  4. Step 4: Simplify right side
    714,715.69x = 387,047,069,523.36
  5. Step 5: Solve for x
    x = 387,047,069,523.36/714,715.69
  6. Step 6: Final answer
    x = 541,539.91

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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.