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Finding the Fourth Proportional to 1,207.72, 1,666.82 and 710.48

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Solution

The fourth proportional to 1,207.72, 1,666.82 and 710.48 is: 980.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.72 : 1,666.82 = 710.48 : x
  2. Step 2: Convert to fraction form
    1,207.72/1,666.82 = 710.48/x
  3. Step 3: Cross multiply
    1,207.72x = 1,666.82 × 710.48
  4. Step 4: Simplify right side
    1,207.72x = 1,184,242.27
  5. Step 5: Solve for x
    x = 1,184,242.27/1,207.72
  6. Step 6: Final answer
    x = 980.56

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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.