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Finding the Fourth Proportional to 3,430.50, 5,145.75 and 833.45

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Solution

The fourth proportional to 3,430.50, 5,145.75 and 833.45 is: 1,250.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,430.50 : 5,145.75 = 833.45 : x
  2. Step 2: Convert to fraction form
    3,430.50/5,145.75 = 833.45/x
  3. Step 3: Cross multiply
    3,430.50x = 5,145.75 × 833.45
  4. Step 4: Simplify right side
    3,430.50x = 4,288,699.61
  5. Step 5: Solve for x
    x = 4,288,699.61/3,430.50
  6. Step 6: Final answer
    x = 1,250.17

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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.