Home / 1,553.08-2,139.76-1,429.08

Finding the Fourth Proportional to 1,553.08, 2,139.76 and 1,429.08

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Solution

The fourth proportional to 1,553.08, 2,139.76 and 1,429.08 is: 1,968.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.08 : 2,139.76 = 1,429.08 : x
  2. Step 2: Convert to fraction form
    1,553.08/2,139.76 = 1,429.08/x
  3. Step 3: Cross multiply
    1,553.08x = 2,139.76 × 1,429.08
  4. Step 4: Simplify right side
    1,553.08x = 3,057,888.22
  5. Step 5: Solve for x
    x = 3,057,888.22/1,553.08
  6. Step 6: Final answer
    x = 1,968.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.