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Finding the Fourth Proportional to 876.94, 1,209.36 and 581.92

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Solution

The fourth proportional to 876.94, 1,209.36 and 581.92 is: 802.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.94 : 1,209.36 = 581.92 : x
  2. Step 2: Convert to fraction form
    876.94/1,209.36 = 581.92/x
  3. Step 3: Cross multiply
    876.94x = 1,209.36 × 581.92
  4. Step 4: Simplify right side
    876.94x = 703,750.77
  5. Step 5: Solve for x
    x = 703,750.77/876.94
  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.