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Finding the Fourth Proportional to 445.40, 669.45 and 437.30

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Solution

The fourth proportional to 445.40, 669.45 and 437.30 is: 657.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.40 : 669.45 = 437.30 : x
  2. Step 2: Convert to fraction form
    445.40/669.45 = 437.30/x
  3. Step 3: Cross multiply
    445.40x = 669.45 × 437.30
  4. Step 4: Simplify right side
    445.40x = 292,750.49
  5. Step 5: Solve for x
    x = 292,750.49/445.40
  6. Step 6: Final answer
    x = 657.28

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1.5x scale

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.