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Finding the Fourth Proportional to 1,619.97, 2,430.99 and 646.13

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Solution

The fourth proportional to 1,619.97, 2,430.99 and 646.13 is: 969.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,619.97 : 2,430.99 = 646.13 : x
  2. Step 2: Convert to fraction form
    1,619.97/2,430.99 = 646.13/x
  3. Step 3: Cross multiply
    1,619.97x = 2,430.99 × 646.13
  4. Step 4: Simplify right side
    1,619.97x = 1,570,723.41
  5. Step 5: Solve for x
    x = 1,570,723.41/1,619.97
  6. Step 6: Final answer
    x = 969.60

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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.