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Finding the Fourth Proportional to 1,214.15, 1,675.61 and 683.07

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Solution

The fourth proportional to 1,214.15, 1,675.61 and 683.07 is: 942.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.15 : 1,675.61 = 683.07 : x
  2. Step 2: Convert to fraction form
    1,214.15/1,675.61 = 683.07/x
  3. Step 3: Cross multiply
    1,214.15x = 1,675.61 × 683.07
  4. Step 4: Simplify right side
    1,214.15x = 1,144,555.51
  5. Step 5: Solve for x
    x = 1,144,555.51/1,214.15
  6. Step 6: Final answer
    x = 942.68

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1.5x scale

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.