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Finding the Fourth Proportional to 557.99, 769.05 and 483.15

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Solution

The fourth proportional to 557.99, 769.05 and 483.15 is: 665.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.99 : 769.05 = 483.15 : x
  2. Step 2: Convert to fraction form
    557.99/769.05 = 483.15/x
  3. Step 3: Cross multiply
    557.99x = 769.05 × 483.15
  4. Step 4: Simplify right side
    557.99x = 371,566.51
  5. Step 5: Solve for x
    x = 371,566.51/557.99
  6. Step 6: Final answer
    x = 665.91

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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.