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Finding the Fourth Proportional to 405.01, 607.50 and 127.35

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Solution

The fourth proportional to 405.01, 607.50 and 127.35 is: 191.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.01 : 607.50 = 127.35 : x
  2. Step 2: Convert to fraction form
    405.01/607.50 = 127.35/x
  3. Step 3: Cross multiply
    405.01x = 607.50 × 127.35
  4. Step 4: Simplify right side
    405.01x = 77,365.13
  5. Step 5: Solve for x
    x = 77,365.13/405.01
  6. Step 6: Final answer
    x = 191.02

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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.