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Finding the Fourth Proportional to 620,231.53, 855,919.51 and 348,299.65

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Solution

The fourth proportional to 620,231.53, 855,919.51 and 348,299.65 is: 480,653.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,231.53 : 855,919.51 = 348,299.65 : x
  2. Step 2: Convert to fraction form
    620,231.53/855,919.51 = 348,299.65/x
  3. Step 3: Cross multiply
    620,231.53x = 855,919.51 × 348,299.65
  4. Step 4: Simplify right side
    620,231.53x = 298,116,461,145.78
  5. Step 5: Solve for x
    x = 298,116,461,145.78/620,231.53
  6. Step 6: Final answer
    x = 480,653.51

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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.