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Finding the Fourth Proportional to 434.83, 651.60 and 319.51

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Solution

The fourth proportional to 434.83, 651.60 and 319.51 is: 478.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.83 : 651.60 = 319.51 : x
  2. Step 2: Convert to fraction form
    434.83/651.60 = 319.51/x
  3. Step 3: Cross multiply
    434.83x = 651.60 × 319.51
  4. Step 4: Simplify right side
    434.83x = 208,192.72
  5. Step 5: Solve for x
    x = 208,192.72/434.83
  6. Step 6: Final answer
    x = 478.79

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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.