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Finding the Fourth Proportional to 688,071.78, 949,532.49 and 386,263.62

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Solution

The fourth proportional to 688,071.78, 949,532.49 and 386,263.62 is: 533,040.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,071.78 : 949,532.49 = 386,263.62 : x
  2. Step 2: Convert to fraction form
    688,071.78/949,532.49 = 386,263.62/x
  3. Step 3: Cross multiply
    688,071.78x = 949,532.49 × 386,263.62
  4. Step 4: Simplify right side
    688,071.78x = 366,769,856,895.01
  5. Step 5: Solve for x
    x = 366,769,856,895.01/688,071.78
  6. Step 6: Final answer
    x = 533,040.11

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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.