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Finding the Fourth Proportional to 346, 477.40 and 215.12

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Solution

The fourth proportional to 346, 477.40 and 215.12 is: 296.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    346 : 477.40 = 215.12 : x
  2. Step 2: Convert to fraction form
    346/477.40 = 215.12/x
  3. Step 3: Cross multiply
    346x = 477.40 × 215.12
  4. Step 4: Simplify right side
    346x = 102,698.29
  5. Step 5: Solve for x
    x = 102,698.29/346
  6. Step 6: Final answer
    x = 296.82

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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.