Home / 1,430.46-2,142.88-1,275.66

Finding the Fourth Proportional to 1,430.46, 2,142.88 and 1,275.66

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Solution

The fourth proportional to 1,430.46, 2,142.88 and 1,275.66 is: 1,910.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.46 : 2,142.88 = 1,275.66 : x
  2. Step 2: Convert to fraction form
    1,430.46/2,142.88 = 1,275.66/x
  3. Step 3: Cross multiply
    1,430.46x = 2,142.88 × 1,275.66
  4. Step 4: Simplify right side
    1,430.46x = 2,733,586.30
  5. Step 5: Solve for x
    x = 2,733,586.30/1,430.46
  6. Step 6: Final answer
    x = 1,910.98

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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.