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Finding the Fourth Proportional to 2,385.60, 3,578.40 and 654.22

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Solution

The fourth proportional to 2,385.60, 3,578.40 and 654.22 is: 981.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,385.60 : 3,578.40 = 654.22 : x
  2. Step 2: Convert to fraction form
    2,385.60/3,578.40 = 654.22/x
  3. Step 3: Cross multiply
    2,385.60x = 3,578.40 × 654.22
  4. Step 4: Simplify right side
    2,385.60x = 2,341,060.85
  5. Step 5: Solve for x
    x = 2,341,060.85/2,385.60
  6. Step 6: Final answer
    x = 981.33

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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.