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Finding the Fourth Proportional to 1,011.95, 1,396.38 and 569.75

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Solution

The fourth proportional to 1,011.95, 1,396.38 and 569.75 is: 786.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.95 : 1,396.38 = 569.75 : x
  2. Step 2: Convert to fraction form
    1,011.95/1,396.38 = 569.75/x
  3. Step 3: Cross multiply
    1,011.95x = 1,396.38 × 569.75
  4. Step 4: Simplify right side
    1,011.95x = 795,587.51
  5. Step 5: Solve for x
    x = 795,587.51/1,011.95
  6. Step 6: Final answer
    x = 786.19

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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.