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Finding the Fourth Proportional to 904.85, 1,356.60 and 579.59

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Solution

The fourth proportional to 904.85, 1,356.60 and 579.59 is: 868.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.85 : 1,356.60 = 579.59 : x
  2. Step 2: Convert to fraction form
    904.85/1,356.60 = 579.59/x
  3. Step 3: Cross multiply
    904.85x = 1,356.60 × 579.59
  4. Step 4: Simplify right side
    904.85x = 786,271.79
  5. Step 5: Solve for x
    x = 786,271.79/904.85
  6. Step 6: Final answer
    x = 868.95

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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.