Home / 1,677.56-2,315.01-921.35

Finding the Fourth Proportional to 1,677.56, 2,315.01 and 921.35

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Solution

The fourth proportional to 1,677.56, 2,315.01 and 921.35 is: 1,271.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,677.56 : 2,315.01 = 921.35 : x
  2. Step 2: Convert to fraction form
    1,677.56/2,315.01 = 921.35/x
  3. Step 3: Cross multiply
    1,677.56x = 2,315.01 × 921.35
  4. Step 4: Simplify right side
    1,677.56x = 2,132,930.98
  5. Step 5: Solve for x
    x = 2,132,930.98/1,677.56
  6. Step 6: Final answer
    x = 1,271.45

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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.