Home / 1,688.36-2,328.10-1,097.80

Finding the Fourth Proportional to 1,688.36, 2,328.10 and 1,097.80

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Solution

The fourth proportional to 1,688.36, 2,328.10 and 1,097.80 is: 1,513.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.36 : 2,328.10 = 1,097.80 : x
  2. Step 2: Convert to fraction form
    1,688.36/2,328.10 = 1,097.80/x
  3. Step 3: Cross multiply
    1,688.36x = 2,328.10 × 1,097.80
  4. Step 4: Simplify right side
    1,688.36x = 2,555,788.18
  5. Step 5: Solve for x
    x = 2,555,788.18/1,688.36
  6. Step 6: Final answer
    x = 1,513.77

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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.