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Finding the Fourth Proportional to 904.18, 1,351.64 and 670.90

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Solution

The fourth proportional to 904.18, 1,351.64 and 670.90 is: 1,002.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.18 : 1,351.64 = 670.90 : x
  2. Step 2: Convert to fraction form
    904.18/1,351.64 = 670.90/x
  3. Step 3: Cross multiply
    904.18x = 1,351.64 × 670.90
  4. Step 4: Simplify right side
    904.18x = 906,815.28
  5. Step 5: Solve for x
    x = 906,815.28/904.18
  6. Step 6: Final answer
    x = 1,002.91

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.