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Finding the Fourth Proportional to 921.77, 1,384.01 and 375.02

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Solution

The fourth proportional to 921.77, 1,384.01 and 375.02 is: 563.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.77 : 1,384.01 = 375.02 : x
  2. Step 2: Convert to fraction form
    921.77/1,384.01 = 375.02/x
  3. Step 3: Cross multiply
    921.77x = 1,384.01 × 375.02
  4. Step 4: Simplify right side
    921.77x = 519,022.64
  5. Step 5: Solve for x
    x = 519,022.64/921.77
  6. Step 6: Final answer
    x = 563.07

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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.