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Finding the Fourth Proportional to 507.24, 761.40 and 315

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Solution

The fourth proportional to 507.24, 761.40 and 315 is: 472.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.24 : 761.40 = 315 : x
  2. Step 2: Convert to fraction form
    507.24/761.40 = 315/x
  3. Step 3: Cross multiply
    507.24x = 761.40 × 315
  4. Step 4: Simplify right side
    507.24x = 239,841
  5. Step 5: Solve for x
    x = 239,841/507.24
  6. Step 6: Final answer
    x = 472.84

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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.