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Finding the Fourth Proportional to 923.18, 1,384.79 and 436.59

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Solution

The fourth proportional to 923.18, 1,384.79 and 436.59 is: 654.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.18 : 1,384.79 = 436.59 : x
  2. Step 2: Convert to fraction form
    923.18/1,384.79 = 436.59/x
  3. Step 3: Cross multiply
    923.18x = 1,384.79 × 436.59
  4. Step 4: Simplify right side
    923.18x = 604,583.28
  5. Step 5: Solve for x
    x = 604,583.28/923.18
  6. Step 6: Final answer
    x = 654.90

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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.