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Finding the Fourth Proportional to 407.35, 562.36 and 313.89

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Solution

The fourth proportional to 407.35, 562.36 and 313.89 is: 433.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.35 : 562.36 = 313.89 : x
  2. Step 2: Convert to fraction form
    407.35/562.36 = 313.89/x
  3. Step 3: Cross multiply
    407.35x = 562.36 × 313.89
  4. Step 4: Simplify right side
    407.35x = 176,516.34
  5. Step 5: Solve for x
    x = 176,516.34/407.35
  6. Step 6: Final answer
    x = 433.33

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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.