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Finding the Fourth Proportional to 942.45, 1,300.49 and 522.79

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Solution

The fourth proportional to 942.45, 1,300.49 and 522.79 is: 721.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.45 : 1,300.49 = 522.79 : x
  2. Step 2: Convert to fraction form
    942.45/1,300.49 = 522.79/x
  3. Step 3: Cross multiply
    942.45x = 1,300.49 × 522.79
  4. Step 4: Simplify right side
    942.45x = 679,883.17
  5. Step 5: Solve for x
    x = 679,883.17/942.45
  6. Step 6: Final answer
    x = 721.40

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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.