Home / 1,430.06-2,145.10-1,391.18

Finding the Fourth Proportional to 1,430.06, 2,145.10 and 1,391.18

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Solution

The fourth proportional to 1,430.06, 2,145.10 and 1,391.18 is: 2,086.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.06 : 2,145.10 = 1,391.18 : x
  2. Step 2: Convert to fraction form
    1,430.06/2,145.10 = 1,391.18/x
  3. Step 3: Cross multiply
    1,430.06x = 2,145.10 × 1,391.18
  4. Step 4: Simplify right side
    1,430.06x = 2,984,220.22
  5. Step 5: Solve for x
    x = 2,984,220.22/1,430.06
  6. Step 6: Final answer
    x = 2,086.78

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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.