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Finding the Fourth Proportional to 490,440.87, 676,868.85 and 275,576.25

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Solution

The fourth proportional to 490,440.87, 676,868.85 and 275,576.25 is: 380,329.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,440.87 : 676,868.85 = 275,576.25 : x
  2. Step 2: Convert to fraction form
    490,440.87/676,868.85 = 275,576.25/x
  3. Step 3: Cross multiply
    490,440.87x = 676,868.85 × 275,576.25
  4. Step 4: Simplify right side
    490,440.87x = 186,528,979,424.81
  5. Step 5: Solve for x
    x = 186,528,979,424.81/490,440.87
  6. Step 6: Final answer
    x = 380,329.19

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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.