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Finding the Fourth Proportional to 4,709, 7,063.70 and 1,787.50

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Solution

The fourth proportional to 4,709, 7,063.70 and 1,787.50 is: 2,681.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,709 : 7,063.70 = 1,787.50 : x
  2. Step 2: Convert to fraction form
    4,709/7,063.70 = 1,787.50/x
  3. Step 3: Cross multiply
    4,709x = 7,063.70 × 1,787.50
  4. Step 4: Simplify right side
    4,709x = 12,626,363.75
  5. Step 5: Solve for x
    x = 12,626,363.75/4,709
  6. Step 6: Final answer
    x = 2,681.33

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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.