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Finding the Fourth Proportional to 851.35, 1,174.53 and 571.45

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Solution

The fourth proportional to 851.35, 1,174.53 and 571.45 is: 788.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.35 : 1,174.53 = 571.45 : x
  2. Step 2: Convert to fraction form
    851.35/1,174.53 = 571.45/x
  3. Step 3: Cross multiply
    851.35x = 1,174.53 × 571.45
  4. Step 4: Simplify right side
    851.35x = 671,185.17
  5. Step 5: Solve for x
    x = 671,185.17/851.35
  6. Step 6: Final answer
    x = 788.38

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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.