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Finding the Fourth Proportional to 656.33, 903.03 and 640.13

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Solution

The fourth proportional to 656.33, 903.03 and 640.13 is: 880.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.33 : 903.03 = 640.13 : x
  2. Step 2: Convert to fraction form
    656.33/903.03 = 640.13/x
  3. Step 3: Cross multiply
    656.33x = 903.03 × 640.13
  4. Step 4: Simplify right side
    656.33x = 578,056.59
  5. Step 5: Solve for x
    x = 578,056.59/656.33
  6. Step 6: Final answer
    x = 880.74

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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.