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Finding the Fourth Proportional to 802.99, 1,203.81 and 309.13

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Solution

The fourth proportional to 802.99, 1,203.81 and 309.13 is: 463.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.99 : 1,203.81 = 309.13 : x
  2. Step 2: Convert to fraction form
    802.99/1,203.81 = 309.13/x
  3. Step 3: Cross multiply
    802.99x = 1,203.81 × 309.13
  4. Step 4: Simplify right side
    802.99x = 372,133.79
  5. Step 5: Solve for x
    x = 372,133.79/802.99
  6. Step 6: Final answer
    x = 463.44

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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.