Home / 1,931.07-2,907.16-1,318.65

Finding the Fourth Proportional to 1,931.07, 2,907.16 and 1,318.65

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Solution

The fourth proportional to 1,931.07, 2,907.16 and 1,318.65 is: 1,985.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931.07 : 2,907.16 = 1,318.65 : x
  2. Step 2: Convert to fraction form
    1,931.07/2,907.16 = 1,318.65/x
  3. Step 3: Cross multiply
    1,931.07x = 2,907.16 × 1,318.65
  4. Step 4: Simplify right side
    1,931.07x = 3,833,519.94
  5. Step 5: Solve for x
    x = 3,833,519.94/1,931.07
  6. Step 6: Final answer
    x = 1,985.18

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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.