Home / 1,638.19-2,457.40-542.58

Finding the Fourth Proportional to 1,638.19, 2,457.40 and 542.58

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Solution

The fourth proportional to 1,638.19, 2,457.40 and 542.58 is: 813.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.19 : 2,457.40 = 542.58 : x
  2. Step 2: Convert to fraction form
    1,638.19/2,457.40 = 542.58/x
  3. Step 3: Cross multiply
    1,638.19x = 2,457.40 × 542.58
  4. Step 4: Simplify right side
    1,638.19x = 1,333,336.09
  5. Step 5: Solve for x
    x = 1,333,336.09/1,638.19
  6. Step 6: Final answer
    x = 813.91

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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.