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Finding the Fourth Proportional to 1,605.63, 2,214.85 and 1,007.89

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Solution

The fourth proportional to 1,605.63, 2,214.85 and 1,007.89 is: 1,390.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.63 : 2,214.85 = 1,007.89 : x
  2. Step 2: Convert to fraction form
    1,605.63/2,214.85 = 1,007.89/x
  3. Step 3: Cross multiply
    1,605.63x = 2,214.85 × 1,007.89
  4. Step 4: Simplify right side
    1,605.63x = 2,232,319.00
  5. Step 5: Solve for x
    x = 2,232,319.00/1,605.63
  6. Step 6: Final answer
    x = 1,390.31

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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.