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Finding the Fourth Proportional to 953.45, 1,430.94 and 923.08

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Solution

The fourth proportional to 953.45, 1,430.94 and 923.08 is: 1,385.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.45 : 1,430.94 = 923.08 : x
  2. Step 2: Convert to fraction form
    953.45/1,430.94 = 923.08/x
  3. Step 3: Cross multiply
    953.45x = 1,430.94 × 923.08
  4. Step 4: Simplify right side
    953.45x = 1,320,872.10
  5. Step 5: Solve for x
    x = 1,320,872.10/953.45
  6. Step 6: Final answer
    x = 1,385.36

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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.