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Finding the Fourth Proportional to 1,064.01, 1,594.54 and 405.20

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Solution

The fourth proportional to 1,064.01, 1,594.54 and 405.20 is: 607.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,064.01 : 1,594.54 = 405.20 : x
  2. Step 2: Convert to fraction form
    1,064.01/1,594.54 = 405.20/x
  3. Step 3: Cross multiply
    1,064.01x = 1,594.54 × 405.20
  4. Step 4: Simplify right side
    1,064.01x = 646,109.82
  5. Step 5: Solve for x
    x = 646,109.82/1,064.01
  6. Step 6: Final answer
    x = 607.24

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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.