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Finding the Fourth Proportional to 570.51, 851.02 and 515.79

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Solution

The fourth proportional to 570.51, 851.02 and 515.79 is: 769.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.51 : 851.02 = 515.79 : x
  2. Step 2: Convert to fraction form
    570.51/851.02 = 515.79/x
  3. Step 3: Cross multiply
    570.51x = 851.02 × 515.79
  4. Step 4: Simplify right side
    570.51x = 438,946.32
  5. Step 5: Solve for x
    x = 438,946.32/570.51
  6. Step 6: Final answer
    x = 769.39

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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.