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Finding the Fourth Proportional to 1,010.34, 1,394.73 and 715.77

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Solution

The fourth proportional to 1,010.34, 1,394.73 and 715.77 is: 988.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.34 : 1,394.73 = 715.77 : x
  2. Step 2: Convert to fraction form
    1,010.34/1,394.73 = 715.77/x
  3. Step 3: Cross multiply
    1,010.34x = 1,394.73 × 715.77
  4. Step 4: Simplify right side
    1,010.34x = 998,305.89
  5. Step 5: Solve for x
    x = 998,305.89/1,010.34
  6. Step 6: Final answer
    x = 988.09

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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.