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Finding the Fourth Proportional to 534.90, 802.35 and 328.80

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Solution

The fourth proportional to 534.90, 802.35 and 328.80 is: 493.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    534.90 : 802.35 = 328.80 : x
  2. Step 2: Convert to fraction form
    534.90/802.35 = 328.80/x
  3. Step 3: Cross multiply
    534.90x = 802.35 × 328.80
  4. Step 4: Simplify right side
    534.90x = 263,812.68
  5. Step 5: Solve for x
    x = 263,812.68/534.90
  6. Step 6: Final answer
    x = 493.20

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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.