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Finding the Fourth Proportional to 419.13, 578.18 and 302.79

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Solution

The fourth proportional to 419.13, 578.18 and 302.79 is: 417.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.13 : 578.18 = 302.79 : x
  2. Step 2: Convert to fraction form
    419.13/578.18 = 302.79/x
  3. Step 3: Cross multiply
    419.13x = 578.18 × 302.79
  4. Step 4: Simplify right side
    419.13x = 175,065.61
  5. Step 5: Solve for x
    x = 175,065.61/419.13
  6. Step 6: Final answer
    x = 417.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.