Home / 1,312.01-1,968.35-387.57

Finding the Fourth Proportional to 1,312.01, 1,968.35 and 387.57

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Solution

The fourth proportional to 1,312.01, 1,968.35 and 387.57 is: 581.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.01 : 1,968.35 = 387.57 : x
  2. Step 2: Convert to fraction form
    1,312.01/1,968.35 = 387.57/x
  3. Step 3: Cross multiply
    1,312.01x = 1,968.35 × 387.57
  4. Step 4: Simplify right side
    1,312.01x = 762,867.78
  5. Step 5: Solve for x
    x = 762,867.78/1,312.01
  6. Step 6: Final answer
    x = 581.45

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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.