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Finding the Fourth Proportional to 620,120.89, 855,816.47 and 348,206.86

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Solution

The fourth proportional to 620,120.89, 855,816.47 and 348,206.86 is: 480,553.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,120.89 : 855,816.47 = 348,206.86 : x
  2. Step 2: Convert to fraction form
    620,120.89/855,816.47 = 348,206.86/x
  3. Step 3: Cross multiply
    620,120.89x = 855,816.47 × 348,206.86
  4. Step 4: Simplify right side
    620,120.89x = 298,001,165,754.98
  5. Step 5: Solve for x
    x = 298,001,165,754.98/620,120.89
  6. Step 6: Final answer
    x = 480,553.34

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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.