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Finding the Fourth Proportional to 897.98, 1,238.55 and 676.94

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Solution

The fourth proportional to 897.98, 1,238.55 and 676.94 is: 933.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.98 : 1,238.55 = 676.94 : x
  2. Step 2: Convert to fraction form
    897.98/1,238.55 = 676.94/x
  3. Step 3: Cross multiply
    897.98x = 1,238.55 × 676.94
  4. Step 4: Simplify right side
    897.98x = 838,424.04
  5. Step 5: Solve for x
    x = 838,424.04/897.98
  6. Step 6: Final answer
    x = 933.68

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1.5x scale

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.