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Finding the Fourth Proportional to 1,245.30, 1,875.30 and 1,002.30

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Solution

The fourth proportional to 1,245.30, 1,875.30 and 1,002.30 is: 1,509.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.30 : 1,875.30 = 1,002.30 : x
  2. Step 2: Convert to fraction form
    1,245.30/1,875.30 = 1,002.30/x
  3. Step 3: Cross multiply
    1,245.30x = 1,875.30 × 1,002.30
  4. Step 4: Simplify right side
    1,245.30x = 1,879,613.19
  5. Step 5: Solve for x
    x = 1,879,613.19/1,245.30
  6. Step 6: Final answer
    x = 1,509.37

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.