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Finding the Fourth Proportional to 490,439.36, 676,866.78 and 275,574.75

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Solution

The fourth proportional to 490,439.36, 676,866.78 and 275,574.75 is: 380,327.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,439.36 : 676,866.78 = 275,574.75 : x
  2. Step 2: Convert to fraction form
    490,439.36/676,866.78 = 275,574.75/x
  3. Step 3: Cross multiply
    490,439.36x = 676,866.78 × 275,574.75
  4. Step 4: Simplify right side
    490,439.36x = 186,527,393,681.81
  5. Step 5: Solve for x
    x = 186,527,393,681.81/490,439.36
  6. Step 6: Final answer
    x = 380,327.13

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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.