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Finding the Fourth Proportional to 771.63, 1,157.48 and 590.13

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Solution

The fourth proportional to 771.63, 1,157.48 and 590.13 is: 885.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    771.63 : 1,157.48 = 590.13 : x
  2. Step 2: Convert to fraction form
    771.63/1,157.48 = 590.13/x
  3. Step 3: Cross multiply
    771.63x = 1,157.48 × 590.13
  4. Step 4: Simplify right side
    771.63x = 683,060.72
  5. Step 5: Solve for x
    x = 683,060.72/771.63
  6. Step 6: Final answer
    x = 885.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.