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Finding the Fourth Proportional to 1,305.91, 1,802.21 and 746.50

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Solution

The fourth proportional to 1,305.91, 1,802.21 and 746.50 is: 1,030.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305.91 : 1,802.21 = 746.50 : x
  2. Step 2: Convert to fraction form
    1,305.91/1,802.21 = 746.50/x
  3. Step 3: Cross multiply
    1,305.91x = 1,802.21 × 746.50
  4. Step 4: Simplify right side
    1,305.91x = 1,345,349.77
  5. Step 5: Solve for x
    x = 1,345,349.77/1,305.91
  6. Step 6: Final answer
    x = 1,030.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.