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Finding the Fourth Proportional to 614.99, 848.99 and 405.30

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Solution

The fourth proportional to 614.99, 848.99 and 405.30 is: 559.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.99 : 848.99 = 405.30 : x
  2. Step 2: Convert to fraction form
    614.99/848.99 = 405.30/x
  3. Step 3: Cross multiply
    614.99x = 848.99 × 405.30
  4. Step 4: Simplify right side
    614.99x = 344,095.65
  5. Step 5: Solve for x
    x = 344,095.65/614.99
  6. Step 6: Final answer
    x = 559.51

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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.