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Finding the Fourth Proportional to 445.48, 614.40 and 340.60

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Solution

The fourth proportional to 445.48, 614.40 and 340.60 is: 469.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.48 : 614.40 = 340.60 : x
  2. Step 2: Convert to fraction form
    445.48/614.40 = 340.60/x
  3. Step 3: Cross multiply
    445.48x = 614.40 × 340.60
  4. Step 4: Simplify right side
    445.48x = 209,264.64
  5. Step 5: Solve for x
    x = 209,264.64/445.48
  6. Step 6: Final answer
    x = 469.75

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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.