Home / 2,907.86-4,013.28-1,915.17

Finding the Fourth Proportional to 2,907.86, 4,013.28 and 1,915.17

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Solution

The fourth proportional to 2,907.86, 4,013.28 and 1,915.17 is: 2,643.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,907.86 : 4,013.28 = 1,915.17 : x
  2. Step 2: Convert to fraction form
    2,907.86/4,013.28 = 1,915.17/x
  3. Step 3: Cross multiply
    2,907.86x = 4,013.28 × 1,915.17
  4. Step 4: Simplify right side
    2,907.86x = 7,686,113.46
  5. Step 5: Solve for x
    x = 7,686,113.46/2,907.86
  6. Step 6: Final answer
    x = 2,643.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.