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Finding the Fourth Proportional to 345,367.35, 515,518.05 and 320,039.28

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Solution

The fourth proportional to 345,367.35, 515,518.05 and 320,039.28 is: 477,711.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,367.35 : 515,518.05 = 320,039.28 : x
  2. Step 2: Convert to fraction form
    345,367.35/515,518.05 = 320,039.28/x
  3. Step 3: Cross multiply
    345,367.35x = 515,518.05 × 320,039.28
  4. Step 4: Simplify right side
    345,367.35x = 164,986,025,549.00
  5. Step 5: Solve for x
    x = 164,986,025,549.00/345,367.35
  6. Step 6: Final answer
    x = 477,711.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.