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Finding the Fourth Proportional to 620,119.89, 855,815.09 and 348,205.86

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Solution

The fourth proportional to 620,119.89, 855,815.09 and 348,205.86 is: 480,551.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,119.89 : 855,815.09 = 348,205.86 : x
  2. Step 2: Convert to fraction form
    620,119.89/855,815.09 = 348,205.86/x
  3. Step 3: Cross multiply
    620,119.89x = 855,815.09 × 348,205.86
  4. Step 4: Simplify right side
    620,119.89x = 297,999,827,673.40
  5. Step 5: Solve for x
    x = 297,999,827,673.40/620,119.89
  6. Step 6: Final answer
    x = 480,551.96

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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.