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Finding the Fourth Proportional to 1,622.70, 2,430.45 and 1,406.70

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Solution

The fourth proportional to 1,622.70, 2,430.45 and 1,406.70 is: 2,106.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,622.70 : 2,430.45 = 1,406.70 : x
  2. Step 2: Convert to fraction form
    1,622.70/2,430.45 = 1,406.70/x
  3. Step 3: Cross multiply
    1,622.70x = 2,430.45 × 1,406.70
  4. Step 4: Simplify right side
    1,622.70x = 3,418,914.02
  5. Step 5: Solve for x
    x = 3,418,914.02/1,622.70
  6. Step 6: Final answer
    x = 2,106.93

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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.