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Finding the Fourth Proportional to 918.03, 1,373.55 and 807.47

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Solution

The fourth proportional to 918.03, 1,373.55 and 807.47 is: 1,208.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.03 : 1,373.55 = 807.47 : x
  2. Step 2: Convert to fraction form
    918.03/1,373.55 = 807.47/x
  3. Step 3: Cross multiply
    918.03x = 1,373.55 × 807.47
  4. Step 4: Simplify right side
    918.03x = 1,109,093.55
  5. Step 5: Solve for x
    x = 1,109,093.55/918.03
  6. Step 6: Final answer
    x = 1,208.12

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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.