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Finding the Fourth Proportional to 950.85, 1,312.20 and 577.80

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Solution

The fourth proportional to 950.85, 1,312.20 and 577.80 is: 797.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.85 : 1,312.20 = 577.80 : x
  2. Step 2: Convert to fraction form
    950.85/1,312.20 = 577.80/x
  3. Step 3: Cross multiply
    950.85x = 1,312.20 × 577.80
  4. Step 4: Simplify right side
    950.85x = 758,189.16
  5. Step 5: Solve for x
    x = 758,189.16/950.85
  6. Step 6: Final answer
    x = 797.38

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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.