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Finding the Fourth Proportional to 883.31, 1,218.78 and 568.49

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Solution

The fourth proportional to 883.31, 1,218.78 and 568.49 is: 784.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.31 : 1,218.78 = 568.49 : x
  2. Step 2: Convert to fraction form
    883.31/1,218.78 = 568.49/x
  3. Step 3: Cross multiply
    883.31x = 1,218.78 × 568.49
  4. Step 4: Simplify right side
    883.31x = 692,858.15
  5. Step 5: Solve for x
    x = 692,858.15/883.31
  6. Step 6: Final answer
    x = 784.39

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1.5x scale

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.