Home / 1,677.79-2,315.25-931.74

Finding the Fourth Proportional to 1,677.79, 2,315.25 and 931.74

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Solution

The fourth proportional to 1,677.79, 2,315.25 and 931.74 is: 1,285.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,677.79 : 2,315.25 = 931.74 : x
  2. Step 2: Convert to fraction form
    1,677.79/2,315.25 = 931.74/x
  3. Step 3: Cross multiply
    1,677.79x = 2,315.25 × 931.74
  4. Step 4: Simplify right side
    1,677.79x = 2,157,202.35
  5. Step 5: Solve for x
    x = 2,157,202.35/1,677.79
  6. Step 6: Final answer
    x = 1,285.74

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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.