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Finding the Fourth Proportional to 1,572.43, 2,358.64 and 402.43

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Solution

The fourth proportional to 1,572.43, 2,358.64 and 402.43 is: 603.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.43 : 2,358.64 = 402.43 : x
  2. Step 2: Convert to fraction form
    1,572.43/2,358.64 = 402.43/x
  3. Step 3: Cross multiply
    1,572.43x = 2,358.64 × 402.43
  4. Step 4: Simplify right side
    1,572.43x = 949,187.50
  5. Step 5: Solve for x
    x = 949,187.50/1,572.43
  6. Step 6: Final answer
    x = 603.65

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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.