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Finding the Fourth Proportional to 3,129.84, 4,318.79 and 3,045.87

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Solution

The fourth proportional to 3,129.84, 4,318.79 and 3,045.87 is: 4,202.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.84 : 4,318.79 = 3,045.87 : x
  2. Step 2: Convert to fraction form
    3,129.84/4,318.79 = 3,045.87/x
  3. Step 3: Cross multiply
    3,129.84x = 4,318.79 × 3,045.87
  4. Step 4: Simplify right side
    3,129.84x = 13,154,457.67
  5. Step 5: Solve for x
    x = 13,154,457.67/3,129.84
  6. Step 6: Final answer
    x = 4,202.92

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1.5x scale

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.