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Finding the Fourth Proportional to 795.21, 1,192.51 and 405.07

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Solution

The fourth proportional to 795.21, 1,192.51 and 405.07 is: 607.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    795.21 : 1,192.51 = 405.07 : x
  2. Step 2: Convert to fraction form
    795.21/1,192.51 = 405.07/x
  3. Step 3: Cross multiply
    795.21x = 1,192.51 × 405.07
  4. Step 4: Simplify right side
    795.21x = 483,050.03
  5. Step 5: Solve for x
    x = 483,050.03/795.21
  6. Step 6: Final answer
    x = 607.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.