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Finding the Fourth Proportional to 561.60, 842.40 and 525.60

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Solution

The fourth proportional to 561.60, 842.40 and 525.60 is: 788.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.60 : 842.40 = 525.60 : x
  2. Step 2: Convert to fraction form
    561.60/842.40 = 525.60/x
  3. Step 3: Cross multiply
    561.60x = 842.40 × 525.60
  4. Step 4: Simplify right side
    561.60x = 442,765.44
  5. Step 5: Solve for x
    x = 442,765.44/561.60
  6. Step 6: Final answer
    x = 788.40

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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.