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Finding the Fourth Proportional to 291.98, 436.04 and 253.58

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Solution

The fourth proportional to 291.98, 436.04 and 253.58 is: 378.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.98 : 436.04 = 253.58 : x
  2. Step 2: Convert to fraction form
    291.98/436.04 = 253.58/x
  3. Step 3: Cross multiply
    291.98x = 436.04 × 253.58
  4. Step 4: Simplify right side
    291.98x = 110,569.48
  5. Step 5: Solve for x
    x = 110,569.48/291.98
  6. Step 6: Final answer
    x = 378.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.