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Finding the Fourth Proportional to 503.99, 695.34 and 307.43

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Solution

The fourth proportional to 503.99, 695.34 and 307.43 is: 424.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.99 : 695.34 = 307.43 : x
  2. Step 2: Convert to fraction form
    503.99/695.34 = 307.43/x
  3. Step 3: Cross multiply
    503.99x = 695.34 × 307.43
  4. Step 4: Simplify right side
    503.99x = 213,768.38
  5. Step 5: Solve for x
    x = 213,768.38/503.99
  6. Step 6: Final answer
    x = 424.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.