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Finding the Fourth Proportional to 4,689.60, 7,035.81 and 1,402.80

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Solution

The fourth proportional to 4,689.60, 7,035.81 and 1,402.80 is: 2,104.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,689.60 : 7,035.81 = 1,402.80 : x
  2. Step 2: Convert to fraction form
    4,689.60/7,035.81 = 1,402.80/x
  3. Step 3: Cross multiply
    4,689.60x = 7,035.81 × 1,402.80
  4. Step 4: Simplify right side
    4,689.60x = 9,869,834.27
  5. Step 5: Solve for x
    x = 9,869,834.27/4,689.60
  6. Step 6: Final answer
    x = 2,104.62

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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.