Home / 1,207.63-1,811.06-385.72

Finding the Fourth Proportional to 1,207.63, 1,811.06 and 385.72

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Solution

The fourth proportional to 1,207.63, 1,811.06 and 385.72 is: 578.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.63 : 1,811.06 = 385.72 : x
  2. Step 2: Convert to fraction form
    1,207.63/1,811.06 = 385.72/x
  3. Step 3: Cross multiply
    1,207.63x = 1,811.06 × 385.72
  4. Step 4: Simplify right side
    1,207.63x = 698,562.06
  5. Step 5: Solve for x
    x = 698,562.06/1,207.63
  6. Step 6: Final answer
    x = 578.46

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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.