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Finding the Fourth Proportional to 520.55, 777.77 and 502.39

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Solution

The fourth proportional to 520.55, 777.77 and 502.39 is: 750.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.55 : 777.77 = 502.39 : x
  2. Step 2: Convert to fraction form
    520.55/777.77 = 502.39/x
  3. Step 3: Cross multiply
    520.55x = 777.77 × 502.39
  4. Step 4: Simplify right side
    520.55x = 390,743.87
  5. Step 5: Solve for x
    x = 390,743.87/520.55
  6. Step 6: Final answer
    x = 750.64

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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.