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Finding the Fourth Proportional to 1,210.23, 1,815.62 and 845.19

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Solution

The fourth proportional to 1,210.23, 1,815.62 and 845.19 is: 1,267.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.23 : 1,815.62 = 845.19 : x
  2. Step 2: Convert to fraction form
    1,210.23/1,815.62 = 845.19/x
  3. Step 3: Cross multiply
    1,210.23x = 1,815.62 × 845.19
  4. Step 4: Simplify right side
    1,210.23x = 1,534,539.64
  5. Step 5: Solve for x
    x = 1,534,539.64/1,210.23
  6. Step 6: Final answer
    x = 1,267.97

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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.