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Finding the Fourth Proportional to 504.31, 695.75 and 307.48

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Solution

The fourth proportional to 504.31, 695.75 and 307.48 is: 424.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.31 : 695.75 = 307.48 : x
  2. Step 2: Convert to fraction form
    504.31/695.75 = 307.48/x
  3. Step 3: Cross multiply
    504.31x = 695.75 × 307.48
  4. Step 4: Simplify right side
    504.31x = 213,929.21
  5. Step 5: Solve for x
    x = 213,929.21/504.31
  6. Step 6: Final answer
    x = 424.20

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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.