Home / 1,315.24-1,972.84-535.21

Finding the Fourth Proportional to 1,315.24, 1,972.84 and 535.21

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Solution

The fourth proportional to 1,315.24, 1,972.84 and 535.21 is: 802.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.24 : 1,972.84 = 535.21 : x
  2. Step 2: Convert to fraction form
    1,315.24/1,972.84 = 535.21/x
  3. Step 3: Cross multiply
    1,315.24x = 1,972.84 × 535.21
  4. Step 4: Simplify right side
    1,315.24x = 1,055,889.53
  5. Step 5: Solve for x
    x = 1,055,889.53/1,315.24
  6. Step 6: Final answer
    x = 802.81

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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.