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Finding the Fourth Proportional to 338,410.53, 507,616.94 and 85,690.90

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Solution

The fourth proportional to 338,410.53, 507,616.94 and 85,690.90 is: 128,536.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,410.53 : 507,616.94 = 85,690.90 : x
  2. Step 2: Convert to fraction form
    338,410.53/507,616.94 = 85,690.90/x
  3. Step 3: Cross multiply
    338,410.53x = 507,616.94 × 85,690.90
  4. Step 4: Simplify right side
    338,410.53x = 43,498,150,746.35
  5. Step 5: Solve for x
    x = 43,498,150,746.35/338,410.53
  6. Step 6: Final answer
    x = 128,536.64

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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.