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Finding the Fourth Proportional to 534.70, 802.65 and 318.40

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Solution

The fourth proportional to 534.70, 802.65 and 318.40 is: 477.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    534.70 : 802.65 = 318.40 : x
  2. Step 2: Convert to fraction form
    534.70/802.65 = 318.40/x
  3. Step 3: Cross multiply
    534.70x = 802.65 × 318.40
  4. Step 4: Simplify right side
    534.70x = 255,563.76
  5. Step 5: Solve for x
    x = 255,563.76/534.70
  6. Step 6: Final answer
    x = 477.96

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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.