Home / 1,677.81-2,315.41-931.84

Finding the Fourth Proportional to 1,677.81, 2,315.41 and 931.84

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Solution

The fourth proportional to 1,677.81, 2,315.41 and 931.84 is: 1,285.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,677.81 : 2,315.41 = 931.84 : x
  2. Step 2: Convert to fraction form
    1,677.81/2,315.41 = 931.84/x
  3. Step 3: Cross multiply
    1,677.81x = 2,315.41 × 931.84
  4. Step 4: Simplify right side
    1,677.81x = 2,157,593.98
  5. Step 5: Solve for x
    x = 2,157,593.98/1,677.81
  6. Step 6: Final answer
    x = 1,285.96

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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.