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Finding the Fourth Proportional to 896.16, 1,236.40 and 581.67

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Solution

The fourth proportional to 896.16, 1,236.40 and 581.67 is: 802.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.16 : 1,236.40 = 581.67 : x
  2. Step 2: Convert to fraction form
    896.16/1,236.40 = 581.67/x
  3. Step 3: Cross multiply
    896.16x = 1,236.40 × 581.67
  4. Step 4: Simplify right side
    896.16x = 719,176.79
  5. Step 5: Solve for x
    x = 719,176.79/896.16
  6. Step 6: Final answer
    x = 802.51

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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.