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Finding the Fourth Proportional to 585.80, 874.54 and 521

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Solution

The fourth proportional to 585.80, 874.54 and 521 is: 777.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.80 : 874.54 = 521 : x
  2. Step 2: Convert to fraction form
    585.80/874.54 = 521/x
  3. Step 3: Cross multiply
    585.80x = 874.54 × 521
  4. Step 4: Simplify right side
    585.80x = 455,635.34
  5. Step 5: Solve for x
    x = 455,635.34/585.80
  6. Step 6: Final answer
    x = 777.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.