Home / 1,490.08-2,229.36-1,421.92

Finding the Fourth Proportional to 1,490.08, 2,229.36 and 1,421.92

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Solution

The fourth proportional to 1,490.08, 2,229.36 and 1,421.92 is: 2,127.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.08 : 2,229.36 = 1,421.92 : x
  2. Step 2: Convert to fraction form
    1,490.08/2,229.36 = 1,421.92/x
  3. Step 3: Cross multiply
    1,490.08x = 2,229.36 × 1,421.92
  4. Step 4: Simplify right side
    1,490.08x = 3,169,971.57
  5. Step 5: Solve for x
    x = 3,169,971.57/1,490.08
  6. Step 6: Final answer
    x = 2,127.38

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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.