Home / 1,246.48-1,870.08-380.80

Finding the Fourth Proportional to 1,246.48, 1,870.08 and 380.80

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Solution

The fourth proportional to 1,246.48, 1,870.08 and 380.80 is: 571.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.48 : 1,870.08 = 380.80 : x
  2. Step 2: Convert to fraction form
    1,246.48/1,870.08 = 380.80/x
  3. Step 3: Cross multiply
    1,246.48x = 1,870.08 × 380.80
  4. Step 4: Simplify right side
    1,246.48x = 712,126.46
  5. Step 5: Solve for x
    x = 712,126.46/1,246.48
  6. Step 6: Final answer
    x = 571.31

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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.