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Finding the Fourth Proportional to 521.12, 777.59 and 503.51

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Solution

The fourth proportional to 521.12, 777.59 and 503.51 is: 751.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.12 : 777.59 = 503.51 : x
  2. Step 2: Convert to fraction form
    521.12/777.59 = 503.51/x
  3. Step 3: Cross multiply
    521.12x = 777.59 × 503.51
  4. Step 4: Simplify right side
    521.12x = 391,517.94
  5. Step 5: Solve for x
    x = 391,517.94/521.12
  6. Step 6: Final answer
    x = 751.30

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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.