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Finding the Fourth Proportional to 403,431.90, 604,972.88 and 137,120.91

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Solution

The fourth proportional to 403,431.90, 604,972.88 and 137,120.91 is: 205,621.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,431.90 : 604,972.88 = 137,120.91 : x
  2. Step 2: Convert to fraction form
    403,431.90/604,972.88 = 137,120.91/x
  3. Step 3: Cross multiply
    403,431.90x = 604,972.88 × 137,120.91
  4. Step 4: Simplify right side
    403,431.90x = 82,954,431,830.92
  5. Step 5: Solve for x
    x = 82,954,431,830.92/403,431.90
  6. Step 6: Final answer
    x = 205,621.90

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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.