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Finding the Fourth Proportional to 713.34, 1,063.80 and 619.79

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Solution

The fourth proportional to 713.34, 1,063.80 and 619.79 is: 924.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.34 : 1,063.80 = 619.79 : x
  2. Step 2: Convert to fraction form
    713.34/1,063.80 = 619.79/x
  3. Step 3: Cross multiply
    713.34x = 1,063.80 × 619.79
  4. Step 4: Simplify right side
    713.34x = 659,327.28
  5. Step 5: Solve for x
    x = 659,327.28/713.34
  6. Step 6: Final answer
    x = 924.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.