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Finding the Fourth Proportional to 346.02, 477.71 and 215.20

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Solution

The fourth proportional to 346.02, 477.71 and 215.20 is: 297.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.02 : 477.71 = 215.20 : x
  2. Step 2: Convert to fraction form
    346.02/477.71 = 215.20/x
  3. Step 3: Cross multiply
    346.02x = 477.71 × 215.20
  4. Step 4: Simplify right side
    346.02x = 102,803.19
  5. Step 5: Solve for x
    x = 102,803.19/346.02
  6. Step 6: Final answer
    x = 297.10

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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.