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Finding the Fourth Proportional to 572.40, 858.60 and 283.86

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Solution

The fourth proportional to 572.40, 858.60 and 283.86 is: 425.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.40 : 858.60 = 283.86 : x
  2. Step 2: Convert to fraction form
    572.40/858.60 = 283.86/x
  3. Step 3: Cross multiply
    572.40x = 858.60 × 283.86
  4. Step 4: Simplify right side
    572.40x = 243,722.20
  5. Step 5: Solve for x
    x = 243,722.20/572.40
  6. Step 6: Final answer
    x = 425.79

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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.