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Finding the Fourth Proportional to 493.93, 681.61 and 307.35

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Solution

The fourth proportional to 493.93, 681.61 and 307.35 is: 424.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.93 : 681.61 = 307.35 : x
  2. Step 2: Convert to fraction form
    493.93/681.61 = 307.35/x
  3. Step 3: Cross multiply
    493.93x = 681.61 × 307.35
  4. Step 4: Simplify right side
    493.93x = 209,487.89
  5. Step 5: Solve for x
    x = 209,487.89/493.93
  6. Step 6: Final answer
    x = 424.13

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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.