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Finding the Fourth Proportional to 296.76, 442.95 and 258.57

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Solution

The fourth proportional to 296.76, 442.95 and 258.57 is: 385.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.76 : 442.95 = 258.57 : x
  2. Step 2: Convert to fraction form
    296.76/442.95 = 258.57/x
  3. Step 3: Cross multiply
    296.76x = 442.95 × 258.57
  4. Step 4: Simplify right side
    296.76x = 114,533.58
  5. Step 5: Solve for x
    x = 114,533.58/296.76
  6. Step 6: Final answer
    x = 385.95

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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.