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Finding the Fourth Proportional to 830.41, 1,145.82 and 609.89

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Solution

The fourth proportional to 830.41, 1,145.82 and 609.89 is: 841.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.41 : 1,145.82 = 609.89 : x
  2. Step 2: Convert to fraction form
    830.41/1,145.82 = 609.89/x
  3. Step 3: Cross multiply
    830.41x = 1,145.82 × 609.89
  4. Step 4: Simplify right side
    830.41x = 698,821.30
  5. Step 5: Solve for x
    x = 698,821.30/830.41
  6. Step 6: Final answer
    x = 841.54

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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.