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Finding the Fourth Proportional to 1,013.45, 1,398.62 and 676.77

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Solution

The fourth proportional to 1,013.45, 1,398.62 and 676.77 is: 933.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,013.45 : 1,398.62 = 676.77 : x
  2. Step 2: Convert to fraction form
    1,013.45/1,398.62 = 676.77/x
  3. Step 3: Cross multiply
    1,013.45x = 1,398.62 × 676.77
  4. Step 4: Simplify right side
    1,013.45x = 946,540.67
  5. Step 5: Solve for x
    x = 946,540.67/1,013.45
  6. Step 6: Final answer
    x = 933.98

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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.