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Finding the Fourth Proportional to 774.41, 1,070.15 and 587.57

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Solution

The fourth proportional to 774.41, 1,070.15 and 587.57 is: 811.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.41 : 1,070.15 = 587.57 : x
  2. Step 2: Convert to fraction form
    774.41/1,070.15 = 587.57/x
  3. Step 3: Cross multiply
    774.41x = 1,070.15 × 587.57
  4. Step 4: Simplify right side
    774.41x = 628,779.75
  5. Step 5: Solve for x
    x = 628,779.75/774.41
  6. Step 6: Final answer
    x = 811.95

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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.