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Finding the Fourth Proportional to 434.63, 651.49 and 312.83

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Solution

The fourth proportional to 434.63, 651.49 and 312.83 is: 468.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.63 : 651.49 = 312.83 : x
  2. Step 2: Convert to fraction form
    434.63/651.49 = 312.83/x
  3. Step 3: Cross multiply
    434.63x = 651.49 × 312.83
  4. Step 4: Simplify right side
    434.63x = 203,804.02
  5. Step 5: Solve for x
    x = 203,804.02/434.63
  6. Step 6: Final answer
    x = 468.91

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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.