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Finding the Fourth Proportional to 1,313.92, 1,970.80 and 583.28

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Solution

The fourth proportional to 1,313.92, 1,970.80 and 583.28 is: 874.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313.92 : 1,970.80 = 583.28 : x
  2. Step 2: Convert to fraction form
    1,313.92/1,970.80 = 583.28/x
  3. Step 3: Cross multiply
    1,313.92x = 1,970.80 × 583.28
  4. Step 4: Simplify right side
    1,313.92x = 1,149,528.22
  5. Step 5: Solve for x
    x = 1,149,528.22/1,313.92
  6. Step 6: Final answer
    x = 874.88

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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.