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Finding the Fourth Proportional to 500.51, 750.65 and 256.91

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Solution

The fourth proportional to 500.51, 750.65 and 256.91 is: 385.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.51 : 750.65 = 256.91 : x
  2. Step 2: Convert to fraction form
    500.51/750.65 = 256.91/x
  3. Step 3: Cross multiply
    500.51x = 750.65 × 256.91
  4. Step 4: Simplify right side
    500.51x = 192,849.49
  5. Step 5: Solve for x
    x = 192,849.49/500.51
  6. Step 6: Final answer
    x = 385.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.