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Finding the Fourth Proportional to 435.60, 601.20 and 278.28

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Solution

The fourth proportional to 435.60, 601.20 and 278.28 is: 384.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.60 : 601.20 = 278.28 : x
  2. Step 2: Convert to fraction form
    435.60/601.20 = 278.28/x
  3. Step 3: Cross multiply
    435.60x = 601.20 × 278.28
  4. Step 4: Simplify right side
    435.60x = 167,301.94
  5. Step 5: Solve for x
    x = 167,301.94/435.60
  6. Step 6: Final answer
    x = 384.07

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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.