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Finding the Fourth Proportional to 1,210.08, 1,806.36 and 1,118.64

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Solution

The fourth proportional to 1,210.08, 1,806.36 and 1,118.64 is: 1,669.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.08 : 1,806.36 = 1,118.64 : x
  2. Step 2: Convert to fraction form
    1,210.08/1,806.36 = 1,118.64/x
  3. Step 3: Cross multiply
    1,210.08x = 1,806.36 × 1,118.64
  4. Step 4: Simplify right side
    1,210.08x = 2,020,666.55
  5. Step 5: Solve for x
    x = 2,020,666.55/1,210.08
  6. Step 6: Final answer
    x = 1,669.86

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.