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Finding the Fourth Proportional to 573.10, 859.15 and 389.90

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Solution

The fourth proportional to 573.10, 859.15 and 389.90 is: 584.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.10 : 859.15 = 389.90 : x
  2. Step 2: Convert to fraction form
    573.10/859.15 = 389.90/x
  3. Step 3: Cross multiply
    573.10x = 859.15 × 389.90
  4. Step 4: Simplify right side
    573.10x = 334,982.59
  5. Step 5: Solve for x
    x = 334,982.59/573.10
  6. Step 6: Final answer
    x = 584.51

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Double scale
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Similar ratio
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1.5x scale

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.