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Finding the Fourth Proportional to 425,878.20, 587,417.22 and 345,309.12

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Solution

The fourth proportional to 425,878.20, 587,417.22 and 345,309.12 is: 476,287.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,878.20 : 587,417.22 = 345,309.12 : x
  2. Step 2: Convert to fraction form
    425,878.20/587,417.22 = 345,309.12/x
  3. Step 3: Cross multiply
    425,878.20x = 587,417.22 × 345,309.12
  4. Step 4: Simplify right side
    425,878.20x = 202,840,523,311.05
  5. Step 5: Solve for x
    x = 202,840,523,311.05/425,878.20
  6. Step 6: Final answer
    x = 476,287.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.