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Finding the Fourth Proportional to 918.04, 1,376.64 and 340.50

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Solution

The fourth proportional to 918.04, 1,376.64 and 340.50 is: 510.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.04 : 1,376.64 = 340.50 : x
  2. Step 2: Convert to fraction form
    918.04/1,376.64 = 340.50/x
  3. Step 3: Cross multiply
    918.04x = 1,376.64 × 340.50
  4. Step 4: Simplify right side
    918.04x = 468,745.92
  5. Step 5: Solve for x
    x = 468,745.92/918.04
  6. Step 6: Final answer
    x = 510.59

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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.