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Finding the Fourth Proportional to 924.02, 1,275.36 and 644.84

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Solution

The fourth proportional to 924.02, 1,275.36 and 644.84 is: 890.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.02 : 1,275.36 = 644.84 : x
  2. Step 2: Convert to fraction form
    924.02/1,275.36 = 644.84/x
  3. Step 3: Cross multiply
    924.02x = 1,275.36 × 644.84
  4. Step 4: Simplify right side
    924.02x = 822,403.14
  5. Step 5: Solve for x
    x = 822,403.14/924.02
  6. Step 6: Final answer
    x = 890.03

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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.