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Finding the Fourth Proportional to 1,430.43, 2,145.20 and 552.86

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Solution

The fourth proportional to 1,430.43, 2,145.20 and 552.86 is: 829.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.43 : 2,145.20 = 552.86 : x
  2. Step 2: Convert to fraction form
    1,430.43/2,145.20 = 552.86/x
  3. Step 3: Cross multiply
    1,430.43x = 2,145.20 × 552.86
  4. Step 4: Simplify right side
    1,430.43x = 1,186,002.02
  5. Step 5: Solve for x
    x = 1,186,002.02/1,430.43
  6. Step 6: Final answer
    x = 829.12

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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.