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Finding the Fourth Proportional to 583.79, 804.88 and 478.49

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Solution

The fourth proportional to 583.79, 804.88 and 478.49 is: 659.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    583.79 : 804.88 = 478.49 : x
  2. Step 2: Convert to fraction form
    583.79/804.88 = 478.49/x
  3. Step 3: Cross multiply
    583.79x = 804.88 × 478.49
  4. Step 4: Simplify right side
    583.79x = 385,127.03
  5. Step 5: Solve for x
    x = 385,127.03/583.79
  6. Step 6: Final answer
    x = 659.70

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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.