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Finding the Fourth Proportional to 478.04, 659.86 and 278.93

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Solution

The fourth proportional to 478.04, 659.86 and 278.93 is: 385.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.04 : 659.86 = 278.93 : x
  2. Step 2: Convert to fraction form
    478.04/659.86 = 278.93/x
  3. Step 3: Cross multiply
    478.04x = 659.86 × 278.93
  4. Step 4: Simplify right side
    478.04x = 184,055.70
  5. Step 5: Solve for x
    x = 184,055.70/478.04
  6. Step 6: Final answer
    x = 385.03

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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.