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Finding the Fourth Proportional to 302.32, 452.78 and 260.16

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Solution

The fourth proportional to 302.32, 452.78 and 260.16 is: 389.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.32 : 452.78 = 260.16 : x
  2. Step 2: Convert to fraction form
    302.32/452.78 = 260.16/x
  3. Step 3: Cross multiply
    302.32x = 452.78 × 260.16
  4. Step 4: Simplify right side
    302.32x = 117,795.24
  5. Step 5: Solve for x
    x = 117,795.24/302.32
  6. Step 6: Final answer
    x = 389.64

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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.