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Finding the Fourth Proportional to 423.84, 585.24 and 391.08

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Solution

The fourth proportional to 423.84, 585.24 and 391.08 is: 540.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.84 : 585.24 = 391.08 : x
  2. Step 2: Convert to fraction form
    423.84/585.24 = 391.08/x
  3. Step 3: Cross multiply
    423.84x = 585.24 × 391.08
  4. Step 4: Simplify right side
    423.84x = 228,875.66
  5. Step 5: Solve for x
    x = 228,875.66/423.84
  6. Step 6: Final answer
    x = 540.00

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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.