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Finding the Fourth Proportional to 345,622.80, 518,434.20 and 266,890.80

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Solution

The fourth proportional to 345,622.80, 518,434.20 and 266,890.80 is: 400,336.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,622.80 : 518,434.20 = 266,890.80 : x
  2. Step 2: Convert to fraction form
    345,622.80/518,434.20 = 266,890.80/x
  3. Step 3: Cross multiply
    345,622.80x = 518,434.20 × 266,890.80
  4. Step 4: Simplify right side
    345,622.80x = 138,365,318,385.36
  5. Step 5: Solve for x
    x = 138,365,318,385.36/345,622.80
  6. Step 6: Final answer
    x = 400,336.20

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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.