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Finding the Fourth Proportional to 449.51, 669.62 and 435.91

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Solution

The fourth proportional to 449.51, 669.62 and 435.91 is: 649.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.51 : 669.62 = 435.91 : x
  2. Step 2: Convert to fraction form
    449.51/669.62 = 435.91/x
  3. Step 3: Cross multiply
    449.51x = 669.62 × 435.91
  4. Step 4: Simplify right side
    449.51x = 291,894.05
  5. Step 5: Solve for x
    x = 291,894.05/449.51
  6. Step 6: Final answer
    x = 649.36

Related Problems

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.