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Finding the Fourth Proportional to 4,991.60, 7,484.88 and 1,528.40

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Solution

The fourth proportional to 4,991.60, 7,484.88 and 1,528.40 is: 2,291.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,991.60 : 7,484.88 = 1,528.40 : x
  2. Step 2: Convert to fraction form
    4,991.60/7,484.88 = 1,528.40/x
  3. Step 3: Cross multiply
    4,991.60x = 7,484.88 × 1,528.40
  4. Step 4: Simplify right side
    4,991.60x = 11,439,890.59
  5. Step 5: Solve for x
    x = 11,439,890.59/4,991.60
  6. Step 6: Final answer
    x = 2,291.83

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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.