Home / 1,407.06-2,108.31-857.58

Finding the Fourth Proportional to 1,407.06, 2,108.31 and 857.58

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Solution

The fourth proportional to 1,407.06, 2,108.31 and 857.58 is: 1,284.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407.06 : 2,108.31 = 857.58 : x
  2. Step 2: Convert to fraction form
    1,407.06/2,108.31 = 857.58/x
  3. Step 3: Cross multiply
    1,407.06x = 2,108.31 × 857.58
  4. Step 4: Simplify right side
    1,407.06x = 1,808,044.49
  5. Step 5: Solve for x
    x = 1,808,044.49/1,407.06
  6. Step 6: Final answer
    x = 1,284.98

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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.