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Finding the Fourth Proportional to 3,124.70, 4,681.52 and 2,785.70

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Solution

The fourth proportional to 3,124.70, 4,681.52 and 2,785.70 is: 4,173.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,124.70 : 4,681.52 = 2,785.70 : x
  2. Step 2: Convert to fraction form
    3,124.70/4,681.52 = 2,785.70/x
  3. Step 3: Cross multiply
    3,124.70x = 4,681.52 × 2,785.70
  4. Step 4: Simplify right side
    3,124.70x = 13,041,310.26
  5. Step 5: Solve for x
    x = 13,041,310.26/3,124.70
  6. Step 6: Final answer
    x = 4,173.62

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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.