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Finding the Fourth Proportional to 535.66, 802.90 and 275.30

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Solution

The fourth proportional to 535.66, 802.90 and 275.30 is: 412.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.66 : 802.90 = 275.30 : x
  2. Step 2: Convert to fraction form
    535.66/802.90 = 275.30/x
  3. Step 3: Cross multiply
    535.66x = 802.90 × 275.30
  4. Step 4: Simplify right side
    535.66x = 221,037.71
  5. Step 5: Solve for x
    x = 221,037.71/535.66
  6. Step 6: Final answer
    x = 412.65

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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.