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Finding the Fourth Proportional to 1,520.30, 2,124.10 and 1,520.30

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Solution

The fourth proportional to 1,520.30, 2,124.10 and 1,520.30 is: 2,124.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.30 : 2,124.10 = 1,520.30 : x
  2. Step 2: Convert to fraction form
    1,520.30/2,124.10 = 1,520.30/x
  3. Step 3: Cross multiply
    1,520.30x = 2,124.10 × 1,520.30
  4. Step 4: Simplify right side
    1,520.30x = 3,229,269.23
  5. Step 5: Solve for x
    x = 3,229,269.23/1,520.30
  6. Step 6: Final answer
    x = 2,124.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.