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Finding the Fourth Proportional to 836.45, 1,153.60 and 719.54

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Solution

The fourth proportional to 836.45, 1,153.60 and 719.54 is: 992.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.45 : 1,153.60 = 719.54 : x
  2. Step 2: Convert to fraction form
    836.45/1,153.60 = 719.54/x
  3. Step 3: Cross multiply
    836.45x = 1,153.60 × 719.54
  4. Step 4: Simplify right side
    836.45x = 830,061.34
  5. Step 5: Solve for x
    x = 830,061.34/836.45
  6. Step 6: Final answer
    x = 992.36

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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.