Home / 1,688.02-2,331.10-1,313.80

Finding the Fourth Proportional to 1,688.02, 2,331.10 and 1,313.80

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Solution

The fourth proportional to 1,688.02, 2,331.10 and 1,313.80 is: 1,814.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.02 : 2,331.10 = 1,313.80 : x
  2. Step 2: Convert to fraction form
    1,688.02/2,331.10 = 1,313.80/x
  3. Step 3: Cross multiply
    1,688.02x = 2,331.10 × 1,313.80
  4. Step 4: Simplify right side
    1,688.02x = 3,062,599.18
  5. Step 5: Solve for x
    x = 3,062,599.18/1,688.02
  6. Step 6: Final answer
    x = 1,814.31

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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.