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Finding the Fourth Proportional to 434.78, 599.45 and 316.67

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Solution

The fourth proportional to 434.78, 599.45 and 316.67 is: 436.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.78 : 599.45 = 316.67 : x
  2. Step 2: Convert to fraction form
    434.78/599.45 = 316.67/x
  3. Step 3: Cross multiply
    434.78x = 599.45 × 316.67
  4. Step 4: Simplify right side
    434.78x = 189,823.25
  5. Step 5: Solve for x
    x = 189,823.25/434.78
  6. Step 6: Final answer
    x = 436.60

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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.