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Finding the Fourth Proportional to 897.08, 1,237.38 and 687.29

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Solution

The fourth proportional to 897.08, 1,237.38 and 687.29 is: 948.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.08 : 1,237.38 = 687.29 : x
  2. Step 2: Convert to fraction form
    897.08/1,237.38 = 687.29/x
  3. Step 3: Cross multiply
    897.08x = 1,237.38 × 687.29
  4. Step 4: Simplify right side
    897.08x = 850,430.14
  5. Step 5: Solve for x
    x = 850,430.14/897.08
  6. Step 6: Final answer
    x = 948.00

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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.