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Finding the Fourth Proportional to 1,207.59, 1,666.42 and 683.61

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Solution

The fourth proportional to 1,207.59, 1,666.42 and 683.61 is: 943.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.59 : 1,666.42 = 683.61 : x
  2. Step 2: Convert to fraction form
    1,207.59/1,666.42 = 683.61/x
  3. Step 3: Cross multiply
    1,207.59x = 1,666.42 × 683.61
  4. Step 4: Simplify right side
    1,207.59x = 1,139,181.38
  5. Step 5: Solve for x
    x = 1,139,181.38/1,207.59
  6. Step 6: Final answer
    x = 943.35

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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.