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Finding the Fourth Proportional to 946.92, 1,420.92 and 657.48

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Solution

The fourth proportional to 946.92, 1,420.92 and 657.48 is: 986.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.92 : 1,420.92 = 657.48 : x
  2. Step 2: Convert to fraction form
    946.92/1,420.92 = 657.48/x
  3. Step 3: Cross multiply
    946.92x = 1,420.92 × 657.48
  4. Step 4: Simplify right side
    946.92x = 934,226.48
  5. Step 5: Solve for x
    x = 934,226.48/946.92
  6. Step 6: Final answer
    x = 986.59

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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.