Home / 669,772.20-1,002,908.70-638,279.40

Finding the Fourth Proportional to 669,772.20, 1,002,908.70 and 638,279.40

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Solution

The fourth proportional to 669,772.20, 1,002,908.70 and 638,279.40 is: 955,751.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,772.20 : 1,002,908.70 = 638,279.40 : x
  2. Step 2: Convert to fraction form
    669,772.20/1,002,908.70 = 638,279.40/x
  3. Step 3: Cross multiply
    669,772.20x = 1,002,908.70 × 638,279.40
  4. Step 4: Simplify right side
    669,772.20x = 640,135,963,290.78
  5. Step 5: Solve for x
    x = 640,135,963,290.78/669,772.20
  6. Step 6: Final answer
    x = 955,751.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.