Home / 1,430.08-2,143.68-1,257.28

Finding the Fourth Proportional to 1,430.08, 2,143.68 and 1,257.28

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Solution

The fourth proportional to 1,430.08, 2,143.68 and 1,257.28 is: 1,884.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.08 : 2,143.68 = 1,257.28 : x
  2. Step 2: Convert to fraction form
    1,430.08/2,143.68 = 1,257.28/x
  3. Step 3: Cross multiply
    1,430.08x = 2,143.68 × 1,257.28
  4. Step 4: Simplify right side
    1,430.08x = 2,695,205.99
  5. Step 5: Solve for x
    x = 2,695,205.99/1,430.08
  6. Step 6: Final answer
    x = 1,884.65

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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.