Home / 3,315.28-4,970.36-1,490

Finding the Fourth Proportional to 3,315.28, 4,970.36 and 1,490

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Solution

The fourth proportional to 3,315.28, 4,970.36 and 1,490 is: 2,233.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,315.28 : 4,970.36 = 1,490 : x
  2. Step 2: Convert to fraction form
    3,315.28/4,970.36 = 1,490/x
  3. Step 3: Cross multiply
    3,315.28x = 4,970.36 × 1,490
  4. Step 4: Simplify right side
    3,315.28x = 7,405,836.40
  5. Step 5: Solve for x
    x = 7,405,836.40/3,315.28
  6. Step 6: Final answer
    x = 2,233.85

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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.