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Finding the Fourth Proportional to 3,490.61, 4,816.99 and 1,918.67

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Solution

The fourth proportional to 3,490.61, 4,816.99 and 1,918.67 is: 2,647.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,490.61 : 4,816.99 = 1,918.67 : x
  2. Step 2: Convert to fraction form
    3,490.61/4,816.99 = 1,918.67/x
  3. Step 3: Cross multiply
    3,490.61x = 4,816.99 × 1,918.67
  4. Step 4: Simplify right side
    3,490.61x = 9,242,221.45
  5. Step 5: Solve for x
    x = 9,242,221.45/3,490.61
  6. Step 6: Final answer
    x = 2,647.74

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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.