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Finding the Fourth Proportional to 1,999.90, 2,999.47 and 1,612.17

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Solution

The fourth proportional to 1,999.90, 2,999.47 and 1,612.17 is: 2,417.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.90 : 2,999.47 = 1,612.17 : x
  2. Step 2: Convert to fraction form
    1,999.90/2,999.47 = 1,612.17/x
  3. Step 3: Cross multiply
    1,999.90x = 2,999.47 × 1,612.17
  4. Step 4: Simplify right side
    1,999.90x = 4,835,655.55
  5. Step 5: Solve for x
    x = 4,835,655.55/1,999.90
  6. Step 6: Final answer
    x = 2,417.95

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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.