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Finding the Fourth Proportional to 1,011.95, 1,396.58 and 569.87

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Solution

The fourth proportional to 1,011.95, 1,396.58 and 569.87 is: 786.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.95 : 1,396.58 = 569.87 : x
  2. Step 2: Convert to fraction form
    1,011.95/1,396.58 = 569.87/x
  3. Step 3: Cross multiply
    1,011.95x = 1,396.58 × 569.87
  4. Step 4: Simplify right side
    1,011.95x = 795,859.21
  5. Step 5: Solve for x
    x = 795,859.21/1,011.95
  6. Step 6: Final answer
    x = 786.46

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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.