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Finding the Fourth Proportional to 657, 907.38 and 449.64

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Solution

The fourth proportional to 657, 907.38 and 449.64 is: 621.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    657 : 907.38 = 449.64 : x
  2. Step 2: Convert to fraction form
    657/907.38 = 449.64/x
  3. Step 3: Cross multiply
    657x = 907.38 × 449.64
  4. Step 4: Simplify right side
    657x = 407,994.34
  5. Step 5: Solve for x
    x = 407,994.34/657
  6. Step 6: Final answer
    x = 621.00

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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.