Home / 1,638.98-2,457.19-1,117.69

Finding the Fourth Proportional to 1,638.98, 2,457.19 and 1,117.69

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Solution

The fourth proportional to 1,638.98, 2,457.19 and 1,117.69 is: 1,675.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.98 : 2,457.19 = 1,117.69 : x
  2. Step 2: Convert to fraction form
    1,638.98/2,457.19 = 1,117.69/x
  3. Step 3: Cross multiply
    1,638.98x = 2,457.19 × 1,117.69
  4. Step 4: Simplify right side
    1,638.98x = 2,746,376.69
  5. Step 5: Solve for x
    x = 2,746,376.69/1,638.98
  6. Step 6: Final answer
    x = 1,675.66

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1.5x scale

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.