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Finding the Fourth Proportional to 973.21, 1,343.02 and 531.15

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Solution

The fourth proportional to 973.21, 1,343.02 and 531.15 is: 732.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.21 : 1,343.02 = 531.15 : x
  2. Step 2: Convert to fraction form
    973.21/1,343.02 = 531.15/x
  3. Step 3: Cross multiply
    973.21x = 1,343.02 × 531.15
  4. Step 4: Simplify right side
    973.21x = 713,349.25
  5. Step 5: Solve for x
    x = 713,349.25/973.21
  6. Step 6: Final answer
    x = 732.99

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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.