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Finding the Fourth Proportional to 1,207.99, 1,666.95 and 676.93

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Solution

The fourth proportional to 1,207.99, 1,666.95 and 676.93 is: 934.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.99 : 1,666.95 = 676.93 : x
  2. Step 2: Convert to fraction form
    1,207.99/1,666.95 = 676.93/x
  3. Step 3: Cross multiply
    1,207.99x = 1,666.95 × 676.93
  4. Step 4: Simplify right side
    1,207.99x = 1,128,408.46
  5. Step 5: Solve for x
    x = 1,128,408.46/1,207.99
  6. Step 6: Final answer
    x = 934.12

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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.