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Finding the Fourth Proportional to 654.81, 903.58 and 392.77

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Solution

The fourth proportional to 654.81, 903.58 and 392.77 is: 541.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.81 : 903.58 = 392.77 : x
  2. Step 2: Convert to fraction form
    654.81/903.58 = 392.77/x
  3. Step 3: Cross multiply
    654.81x = 903.58 × 392.77
  4. Step 4: Simplify right side
    654.81x = 354,897.15
  5. Step 5: Solve for x
    x = 354,897.15/654.81
  6. Step 6: Final answer
    x = 541.99

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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.