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Finding the Fourth Proportional to 973.79, 1,344.34 and 782.66

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Solution

The fourth proportional to 973.79, 1,344.34 and 782.66 is: 1,080.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.79 : 1,344.34 = 782.66 : x
  2. Step 2: Convert to fraction form
    973.79/1,344.34 = 782.66/x
  3. Step 3: Cross multiply
    973.79x = 1,344.34 × 782.66
  4. Step 4: Simplify right side
    973.79x = 1,052,165.48
  5. Step 5: Solve for x
    x = 1,052,165.48/973.79
  6. Step 6: Final answer
    x = 1,080.49

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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.