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Finding the Fourth Proportional to 986.51, 1,361.58 and 567.07

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Solution

The fourth proportional to 986.51, 1,361.58 and 567.07 is: 782.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.51 : 1,361.58 = 567.07 : x
  2. Step 2: Convert to fraction form
    986.51/1,361.58 = 567.07/x
  3. Step 3: Cross multiply
    986.51x = 1,361.58 × 567.07
  4. Step 4: Simplify right side
    986.51x = 772,111.17
  5. Step 5: Solve for x
    x = 772,111.17/986.51
  6. Step 6: Final answer
    x = 782.67

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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.