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Finding the Fourth Proportional to 319.47, 479.40 and 302.05

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Solution

The fourth proportional to 319.47, 479.40 and 302.05 is: 453.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.47 : 479.40 = 302.05 : x
  2. Step 2: Convert to fraction form
    319.47/479.40 = 302.05/x
  3. Step 3: Cross multiply
    319.47x = 479.40 × 302.05
  4. Step 4: Simplify right side
    319.47x = 144,802.77
  5. Step 5: Solve for x
    x = 144,802.77/319.47
  6. Step 6: Final answer
    x = 453.26

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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.