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Finding the Fourth Proportional to 577.80, 870.73 and 520.09

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Solution

The fourth proportional to 577.80, 870.73 and 520.09 is: 783.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.80 : 870.73 = 520.09 : x
  2. Step 2: Convert to fraction form
    577.80/870.73 = 520.09/x
  3. Step 3: Cross multiply
    577.80x = 870.73 × 520.09
  4. Step 4: Simplify right side
    577.80x = 452,854.49
  5. Step 5: Solve for x
    x = 452,854.49/577.80
  6. Step 6: Final answer
    x = 783.76

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.