Home / 1,407.07-2,100.36-1,291.51

Finding the Fourth Proportional to 1,407.07, 2,100.36 and 1,291.51

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Solution

The fourth proportional to 1,407.07, 2,100.36 and 1,291.51 is: 1,927.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407.07 : 2,100.36 = 1,291.51 : x
  2. Step 2: Convert to fraction form
    1,407.07/2,100.36 = 1,291.51/x
  3. Step 3: Cross multiply
    1,407.07x = 2,100.36 × 1,291.51
  4. Step 4: Simplify right side
    1,407.07x = 2,712,635.94
  5. Step 5: Solve for x
    x = 2,712,635.94/1,407.07
  6. Step 6: Final answer
    x = 1,927.86

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.