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Finding the Fourth Proportional to 504.19, 695.79 and 307.81

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Solution

The fourth proportional to 504.19, 695.79 and 307.81 is: 424.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.19 : 695.79 = 307.81 : x
  2. Step 2: Convert to fraction form
    504.19/695.79 = 307.81/x
  3. Step 3: Cross multiply
    504.19x = 695.79 × 307.81
  4. Step 4: Simplify right side
    504.19x = 214,169.38
  5. Step 5: Solve for x
    x = 214,169.38/504.19
  6. Step 6: Final answer
    x = 424.78

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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.