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Finding the Fourth Proportional to 439.95, 607.24 and 315.98

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Solution

The fourth proportional to 439.95, 607.24 and 315.98 is: 436.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.95 : 607.24 = 315.98 : x
  2. Step 2: Convert to fraction form
    439.95/607.24 = 315.98/x
  3. Step 3: Cross multiply
    439.95x = 607.24 × 315.98
  4. Step 4: Simplify right side
    439.95x = 191,875.70
  5. Step 5: Solve for x
    x = 191,875.70/439.95
  6. Step 6: Final answer
    x = 436.13

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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.