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Finding the Fourth Proportional to 655.60, 904.35 and 478.33

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Solution

The fourth proportional to 655.60, 904.35 and 478.33 is: 659.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.60 : 904.35 = 478.33 : x
  2. Step 2: Convert to fraction form
    655.60/904.35 = 478.33/x
  3. Step 3: Cross multiply
    655.60x = 904.35 × 478.33
  4. Step 4: Simplify right side
    655.60x = 432,577.74
  5. Step 5: Solve for x
    x = 432,577.74/655.60
  6. Step 6: Final answer
    x = 659.82

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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.