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Finding the Fourth Proportional to 608.74, 840.10 and 346.77

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Solution

The fourth proportional to 608.74, 840.10 and 346.77 is: 478.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.74 : 840.10 = 346.77 : x
  2. Step 2: Convert to fraction form
    608.74/840.10 = 346.77/x
  3. Step 3: Cross multiply
    608.74x = 840.10 × 346.77
  4. Step 4: Simplify right side
    608.74x = 291,321.48
  5. Step 5: Solve for x
    x = 291,321.48/608.74
  6. Step 6: Final answer
    x = 478.56

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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.