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Finding the Fourth Proportional to 772.56, 1,153.16 and 707.63

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Solution

The fourth proportional to 772.56, 1,153.16 and 707.63 is: 1,056.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.56 : 1,153.16 = 707.63 : x
  2. Step 2: Convert to fraction form
    772.56/1,153.16 = 707.63/x
  3. Step 3: Cross multiply
    772.56x = 1,153.16 × 707.63
  4. Step 4: Simplify right side
    772.56x = 816,005.96
  5. Step 5: Solve for x
    x = 816,005.96/772.56
  6. Step 6: Final answer
    x = 1,056.24

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.