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Finding the Fourth Proportional to 1,053, 1,576.80 and 778.68

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Solution

The fourth proportional to 1,053, 1,576.80 and 778.68 is: 1,166.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,053 : 1,576.80 = 778.68 : x
  2. Step 2: Convert to fraction form
    1,053/1,576.80 = 778.68/x
  3. Step 3: Cross multiply
    1,053x = 1,576.80 × 778.68
  4. Step 4: Simplify right side
    1,053x = 1,227,822.62
  5. Step 5: Solve for x
    x = 1,227,822.62/1,053
  6. Step 6: Final answer
    x = 1,166.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.