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Finding the Fourth Proportional to 876.47, 1,313.77 and 291.32

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Solution

The fourth proportional to 876.47, 1,313.77 and 291.32 is: 436.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.47 : 1,313.77 = 291.32 : x
  2. Step 2: Convert to fraction form
    876.47/1,313.77 = 291.32/x
  3. Step 3: Cross multiply
    876.47x = 1,313.77 × 291.32
  4. Step 4: Simplify right side
    876.47x = 382,727.48
  5. Step 5: Solve for x
    x = 382,727.48/876.47
  6. Step 6: Final answer
    x = 436.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.