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Finding the Fourth Proportional to 953.04, 1,315.47 and 554.79

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Solution

The fourth proportional to 953.04, 1,315.47 and 554.79 is: 765.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.04 : 1,315.47 = 554.79 : x
  2. Step 2: Convert to fraction form
    953.04/1,315.47 = 554.79/x
  3. Step 3: Cross multiply
    953.04x = 1,315.47 × 554.79
  4. Step 4: Simplify right side
    953.04x = 729,806.83
  5. Step 5: Solve for x
    x = 729,806.83/953.04
  6. Step 6: Final answer
    x = 765.77

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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.