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Finding the Fourth Proportional to 973.37, 1,341.87 and 839.99

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Solution

The fourth proportional to 973.37, 1,341.87 and 839.99 is: 1,157.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.37 : 1,341.87 = 839.99 : x
  2. Step 2: Convert to fraction form
    973.37/1,341.87 = 839.99/x
  3. Step 3: Cross multiply
    973.37x = 1,341.87 × 839.99
  4. Step 4: Simplify right side
    973.37x = 1,127,157.38
  5. Step 5: Solve for x
    x = 1,127,157.38/973.37
  6. Step 6: Final answer
    x = 1,157.99

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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.