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Finding the Fourth Proportional to 412.98, 569.58 and 319.74

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Solution

The fourth proportional to 412.98, 569.58 and 319.74 is: 440.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.98 : 569.58 = 319.74 : x
  2. Step 2: Convert to fraction form
    412.98/569.58 = 319.74/x
  3. Step 3: Cross multiply
    412.98x = 569.58 × 319.74
  4. Step 4: Simplify right side
    412.98x = 182,117.51
  5. Step 5: Solve for x
    x = 182,117.51/412.98
  6. Step 6: Final answer
    x = 440.98

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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.