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Finding the Fourth Proportional to 896.90, 1,237.74 and 503.95

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Solution

The fourth proportional to 896.90, 1,237.74 and 503.95 is: 695.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.90 : 1,237.74 = 503.95 : x
  2. Step 2: Convert to fraction form
    896.90/1,237.74 = 503.95/x
  3. Step 3: Cross multiply
    896.90x = 1,237.74 × 503.95
  4. Step 4: Simplify right side
    896.90x = 623,759.07
  5. Step 5: Solve for x
    x = 623,759.07/896.90
  6. Step 6: Final answer
    x = 695.46

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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.