Home / 1,015.18-1,522.76-312.38

Finding the Fourth Proportional to 1,015.18, 1,522.76 and 312.38

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Solution

The fourth proportional to 1,015.18, 1,522.76 and 312.38 is: 468.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.18 : 1,522.76 = 312.38 : x
  2. Step 2: Convert to fraction form
    1,015.18/1,522.76 = 312.38/x
  3. Step 3: Cross multiply
    1,015.18x = 1,522.76 × 312.38
  4. Step 4: Simplify right side
    1,015.18x = 475,679.77
  5. Step 5: Solve for x
    x = 475,679.77/1,015.18
  6. Step 6: Final answer
    x = 468.57

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1.5x scale

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.