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Finding the Fourth Proportional to 1,134, 1,700.81 and 312.05

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Solution

The fourth proportional to 1,134, 1,700.81 and 312.05 is: 468.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,134 : 1,700.81 = 312.05 : x
  2. Step 2: Convert to fraction form
    1,134/1,700.81 = 312.05/x
  3. Step 3: Cross multiply
    1,134x = 1,700.81 × 312.05
  4. Step 4: Simplify right side
    1,134x = 530,740.74
  5. Step 5: Solve for x
    x = 530,740.74/1,134
  6. Step 6: Final answer
    x = 468.03

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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.