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Finding the Fourth Proportional to 440.26, 607.08 and 315.70

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Solution

The fourth proportional to 440.26, 607.08 and 315.70 is: 435.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.26 : 607.08 = 315.70 : x
  2. Step 2: Convert to fraction form
    440.26/607.08 = 315.70/x
  3. Step 3: Cross multiply
    440.26x = 607.08 × 315.70
  4. Step 4: Simplify right side
    440.26x = 191,655.16
  5. Step 5: Solve for x
    x = 191,655.16/440.26
  6. Step 6: Final answer
    x = 435.32

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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.