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Finding the Fourth Proportional to 688,186, 949,696.68 and 386,386.48

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Solution

The fourth proportional to 688,186, 949,696.68 and 386,386.48 is: 533,213.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,186 : 949,696.68 = 386,386.48 : x
  2. Step 2: Convert to fraction form
    688,186/949,696.68 = 386,386.48/x
  3. Step 3: Cross multiply
    688,186x = 949,696.68 × 386,386.48
  4. Step 4: Simplify right side
    688,186x = 366,949,957,252.89
  5. Step 5: Solve for x
    x = 366,949,957,252.89/688,186
  6. Step 6: Final answer
    x = 533,213.34

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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.