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Finding the Fourth Proportional to 507.95, 700.85 and 308.74

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Solution

The fourth proportional to 507.95, 700.85 and 308.74 is: 425.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.95 : 700.85 = 308.74 : x
  2. Step 2: Convert to fraction form
    507.95/700.85 = 308.74/x
  3. Step 3: Cross multiply
    507.95x = 700.85 × 308.74
  4. Step 4: Simplify right side
    507.95x = 216,376.92
  5. Step 5: Solve for x
    x = 216,376.92/507.95
  6. Step 6: Final answer
    x = 425.98

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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.