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Finding the Fourth Proportional to 405.13, 607.57 and 340.15

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Solution

The fourth proportional to 405.13, 607.57 and 340.15 is: 510.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.13 : 607.57 = 340.15 : x
  2. Step 2: Convert to fraction form
    405.13/607.57 = 340.15/x
  3. Step 3: Cross multiply
    405.13x = 607.57 × 340.15
  4. Step 4: Simplify right side
    405.13x = 206,664.94
  5. Step 5: Solve for x
    x = 206,664.94/405.13
  6. Step 6: Final answer
    x = 510.12

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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.