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Finding the Fourth Proportional to 346.94, 520.14 and 130.40

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Solution

The fourth proportional to 346.94, 520.14 and 130.40 is: 195.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.94 : 520.14 = 130.40 : x
  2. Step 2: Convert to fraction form
    346.94/520.14 = 130.40/x
  3. Step 3: Cross multiply
    346.94x = 520.14 × 130.40
  4. Step 4: Simplify right side
    346.94x = 67,826.26
  5. Step 5: Solve for x
    x = 67,826.26/346.94
  6. Step 6: Final answer
    x = 195.50

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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.