Home / 1,431.50-2,145.20-1,021.46

Finding the Fourth Proportional to 1,431.50, 2,145.20 and 1,021.46

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Solution

The fourth proportional to 1,431.50, 2,145.20 and 1,021.46 is: 1,530.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.50 : 2,145.20 = 1,021.46 : x
  2. Step 2: Convert to fraction form
    1,431.50/2,145.20 = 1,021.46/x
  3. Step 3: Cross multiply
    1,431.50x = 2,145.20 × 1,021.46
  4. Step 4: Simplify right side
    1,431.50x = 2,191,235.99
  5. Step 5: Solve for x
    x = 2,191,235.99/1,431.50
  6. Step 6: Final answer
    x = 1,530.73

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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.