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Finding the Fourth Proportional to 924.30, 1,273.47 and 644.04

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Solution

The fourth proportional to 924.30, 1,273.47 and 644.04 is: 887.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.30 : 1,273.47 = 644.04 : x
  2. Step 2: Convert to fraction form
    924.30/1,273.47 = 644.04/x
  3. Step 3: Cross multiply
    924.30x = 1,273.47 × 644.04
  4. Step 4: Simplify right side
    924.30x = 820,165.62
  5. Step 5: Solve for x
    x = 820,165.62/924.30
  6. Step 6: Final answer
    x = 887.34

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1.5x scale

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.