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Finding the Fourth Proportional to 1,010.79, 1,394.94 and 568.74

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Solution

The fourth proportional to 1,010.79, 1,394.94 and 568.74 is: 784.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.79 : 1,394.94 = 568.74 : x
  2. Step 2: Convert to fraction form
    1,010.79/1,394.94 = 568.74/x
  3. Step 3: Cross multiply
    1,010.79x = 1,394.94 × 568.74
  4. Step 4: Simplify right side
    1,010.79x = 793,358.18
  5. Step 5: Solve for x
    x = 793,358.18/1,010.79
  6. Step 6: Final answer
    x = 784.89

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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.