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Finding the Fourth Proportional to 802.48, 1,203.74 and 289.12

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Solution

The fourth proportional to 802.48, 1,203.74 and 289.12 is: 433.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.48 : 1,203.74 = 289.12 : x
  2. Step 2: Convert to fraction form
    802.48/1,203.74 = 289.12/x
  3. Step 3: Cross multiply
    802.48x = 1,203.74 × 289.12
  4. Step 4: Simplify right side
    802.48x = 348,025.31
  5. Step 5: Solve for x
    x = 348,025.31/802.48
  6. Step 6: Final answer
    x = 433.69

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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.