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Finding the Fourth Proportional to 950.86, 1,312.36 and 557.91

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Solution

The fourth proportional to 950.86, 1,312.36 and 557.91 is: 770.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.86 : 1,312.36 = 557.91 : x
  2. Step 2: Convert to fraction form
    950.86/1,312.36 = 557.91/x
  3. Step 3: Cross multiply
    950.86x = 1,312.36 × 557.91
  4. Step 4: Simplify right side
    950.86x = 732,177.37
  5. Step 5: Solve for x
    x = 732,177.37/950.86
  6. Step 6: Final answer
    x = 770.02

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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.