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Finding the Fourth Proportional to 4,607.40, 6,912.84 and 1,687.70

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Solution

The fourth proportional to 4,607.40, 6,912.84 and 1,687.70 is: 2,532.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,607.40 : 6,912.84 = 1,687.70 : x
  2. Step 2: Convert to fraction form
    4,607.40/6,912.84 = 1,687.70/x
  3. Step 3: Cross multiply
    4,607.40x = 6,912.84 × 1,687.70
  4. Step 4: Simplify right side
    4,607.40x = 11,666,800.07
  5. Step 5: Solve for x
    x = 11,666,800.07/4,607.40
  6. Step 6: Final answer
    x = 2,532.19

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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.