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Finding the Fourth Proportional to 405.77, 607.70 and 268.47

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Solution

The fourth proportional to 405.77, 607.70 and 268.47 is: 402.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.77 : 607.70 = 268.47 : x
  2. Step 2: Convert to fraction form
    405.77/607.70 = 268.47/x
  3. Step 3: Cross multiply
    405.77x = 607.70 × 268.47
  4. Step 4: Simplify right side
    405.77x = 163,149.89
  5. Step 5: Solve for x
    x = 163,149.89/405.77
  6. Step 6: Final answer
    x = 402.08

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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.