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Finding the Fourth Proportional to 1,207.48, 1,666.29 and 683.50

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Solution

The fourth proportional to 1,207.48, 1,666.29 and 683.50 is: 943.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.48 : 1,666.29 = 683.50 : x
  2. Step 2: Convert to fraction form
    1,207.48/1,666.29 = 683.50/x
  3. Step 3: Cross multiply
    1,207.48x = 1,666.29 × 683.50
  4. Step 4: Simplify right side
    1,207.48x = 1,138,909.22
  5. Step 5: Solve for x
    x = 1,138,909.22/1,207.48
  6. Step 6: Final answer
    x = 943.21

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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.