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Finding the Fourth Proportional to 486,105.83, 670,725.90 and 279,334.28

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Solution

The fourth proportional to 486,105.83, 670,725.90 and 279,334.28 is: 385,423.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,105.83 : 670,725.90 = 279,334.28 : x
  2. Step 2: Convert to fraction form
    486,105.83/670,725.90 = 279,334.28/x
  3. Step 3: Cross multiply
    486,105.83x = 670,725.90 × 279,334.28
  4. Step 4: Simplify right side
    486,105.83x = 187,356,736,983.16
  5. Step 5: Solve for x
    x = 187,356,736,983.16/486,105.83
  6. Step 6: Final answer
    x = 385,423.76

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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.