Home / 1,386.24-1,908.30-1,053.84

Finding the Fourth Proportional to 1,386.24, 1,908.30 and 1,053.84

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Solution

The fourth proportional to 1,386.24, 1,908.30 and 1,053.84 is: 1,450.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.24 : 1,908.30 = 1,053.84 : x
  2. Step 2: Convert to fraction form
    1,386.24/1,908.30 = 1,053.84/x
  3. Step 3: Cross multiply
    1,386.24x = 1,908.30 × 1,053.84
  4. Step 4: Simplify right side
    1,386.24x = 2,011,042.87
  5. Step 5: Solve for x
    x = 2,011,042.87/1,386.24
  6. Step 6: Final answer
    x = 1,450.72

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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.