Home / 3,123.04-4,684.47-931.78

Finding the Fourth Proportional to 3,123.04, 4,684.47 and 931.78

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Solution

The fourth proportional to 3,123.04, 4,684.47 and 931.78 is: 1,397.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.04 : 4,684.47 = 931.78 : x
  2. Step 2: Convert to fraction form
    3,123.04/4,684.47 = 931.78/x
  3. Step 3: Cross multiply
    3,123.04x = 4,684.47 × 931.78
  4. Step 4: Simplify right side
    3,123.04x = 4,364,895.46
  5. Step 5: Solve for x
    x = 4,364,895.46/3,123.04
  6. Step 6: Final answer
    x = 1,397.64

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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.