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Finding the Fourth Proportional to 585.45, 877.86 and 277.20

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Solution

The fourth proportional to 585.45, 877.86 and 277.20 is: 415.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.45 : 877.86 = 277.20 : x
  2. Step 2: Convert to fraction form
    585.45/877.86 = 277.20/x
  3. Step 3: Cross multiply
    585.45x = 877.86 × 277.20
  4. Step 4: Simplify right side
    585.45x = 243,342.79
  5. Step 5: Solve for x
    x = 243,342.79/585.45
  6. Step 6: Final answer
    x = 415.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.