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Finding the Fourth Proportional to 3,113.03, 4,669.53 and 921.77

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Solution

The fourth proportional to 3,113.03, 4,669.53 and 921.77 is: 1,382.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,113.03 : 4,669.53 = 921.77 : x
  2. Step 2: Convert to fraction form
    3,113.03/4,669.53 = 921.77/x
  3. Step 3: Cross multiply
    3,113.03x = 4,669.53 × 921.77
  4. Step 4: Simplify right side
    3,113.03x = 4,304,232.67
  5. Step 5: Solve for x
    x = 4,304,232.67/3,113.03
  6. Step 6: Final answer
    x = 1,382.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.