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Finding the Fourth Proportional to 639.95, 953.37 and 608.99

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Solution

The fourth proportional to 639.95, 953.37 and 608.99 is: 907.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.95 : 953.37 = 608.99 : x
  2. Step 2: Convert to fraction form
    639.95/953.37 = 608.99/x
  3. Step 3: Cross multiply
    639.95x = 953.37 × 608.99
  4. Step 4: Simplify right side
    639.95x = 580,588.03
  5. Step 5: Solve for x
    x = 580,588.03/639.95
  6. Step 6: Final answer
    x = 907.25

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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.