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Finding the Fourth Proportional to 953.16, 1,315.36 and 554.88

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Solution

The fourth proportional to 953.16, 1,315.36 and 554.88 is: 765.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.16 : 1,315.36 = 554.88 : x
  2. Step 2: Convert to fraction form
    953.16/1,315.36 = 554.88/x
  3. Step 3: Cross multiply
    953.16x = 1,315.36 × 554.88
  4. Step 4: Simplify right side
    953.16x = 729,866.96
  5. Step 5: Solve for x
    x = 729,866.96/953.16
  6. Step 6: Final answer
    x = 765.73

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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.