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Finding the Fourth Proportional to 688,138.04, 949,247.49 and 639,426.72

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Solution

The fourth proportional to 688,138.04, 949,247.49 and 639,426.72 is: 882,052.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,138.04 : 949,247.49 = 639,426.72 : x
  2. Step 2: Convert to fraction form
    688,138.04/949,247.49 = 639,426.72/x
  3. Step 3: Cross multiply
    688,138.04x = 949,247.49 × 639,426.72
  4. Step 4: Simplify right side
    688,138.04x = 606,974,204,252.70
  5. Step 5: Solve for x
    x = 606,974,204,252.70/688,138.04
  6. Step 6: Final answer
    x = 882,052.97

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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.