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Finding the Fourth Proportional to 3,011.88, 4,518.09 and 931.89

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Solution

The fourth proportional to 3,011.88, 4,518.09 and 931.89 is: 1,397.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,011.88 : 4,518.09 = 931.89 : x
  2. Step 2: Convert to fraction form
    3,011.88/4,518.09 = 931.89/x
  3. Step 3: Cross multiply
    3,011.88x = 4,518.09 × 931.89
  4. Step 4: Simplify right side
    3,011.88x = 4,210,362.89
  5. Step 5: Solve for x
    x = 4,210,362.89/3,011.88
  6. Step 6: Final answer
    x = 1,397.92

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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.