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Finding the Fourth Proportional to 543,176.40, 815,542.20 and 306,980.40

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Solution

The fourth proportional to 543,176.40, 815,542.20 and 306,980.40 is: 460,910.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,176.40 : 815,542.20 = 306,980.40 : x
  2. Step 2: Convert to fraction form
    543,176.40/815,542.20 = 306,980.40/x
  3. Step 3: Cross multiply
    543,176.40x = 815,542.20 × 306,980.40
  4. Step 4: Simplify right side
    543,176.40x = 250,355,470,772.88
  5. Step 5: Solve for x
    x = 250,355,470,772.88/543,176.40
  6. Step 6: Final answer
    x = 460,910.07

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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.