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Finding the Fourth Proportional to 398,005.70, 548,313.72 and 276,938.78

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Solution

The fourth proportional to 398,005.70, 548,313.72 and 276,938.78 is: 381,525.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,005.70 : 548,313.72 = 276,938.78 : x
  2. Step 2: Convert to fraction form
    398,005.70/548,313.72 = 276,938.78/x
  3. Step 3: Cross multiply
    398,005.70x = 548,313.72 × 276,938.78
  4. Step 4: Simplify right side
    398,005.70x = 151,849,332,674.06
  5. Step 5: Solve for x
    x = 151,849,332,674.06/398,005.70
  6. Step 6: Final answer
    x = 381,525.52

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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.