Home / 1,931.33-2,907.53-1,318.91

Finding the Fourth Proportional to 1,931.33, 2,907.53 and 1,318.91

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Solution

The fourth proportional to 1,931.33, 2,907.53 and 1,318.91 is: 1,985.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931.33 : 2,907.53 = 1,318.91 : x
  2. Step 2: Convert to fraction form
    1,931.33/2,907.53 = 1,318.91/x
  3. Step 3: Cross multiply
    1,931.33x = 2,907.53 × 1,318.91
  4. Step 4: Simplify right side
    1,931.33x = 3,834,749.26
  5. Step 5: Solve for x
    x = 3,834,749.26/1,931.33
  6. Step 6: Final answer
    x = 1,985.55

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.