Home / 1,688.36-2,326.74-1,215.42

Finding the Fourth Proportional to 1,688.36, 2,326.74 and 1,215.42

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Solution

The fourth proportional to 1,688.36, 2,326.74 and 1,215.42 is: 1,674.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.36 : 2,326.74 = 1,215.42 : x
  2. Step 2: Convert to fraction form
    1,688.36/2,326.74 = 1,215.42/x
  3. Step 3: Cross multiply
    1,688.36x = 2,326.74 × 1,215.42
  4. Step 4: Simplify right side
    1,688.36x = 2,827,966.33
  5. Step 5: Solve for x
    x = 2,827,966.33/1,688.36
  6. Step 6: Final answer
    x = 1,674.98

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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.