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Finding the Fourth Proportional to 620,145.80, 855,790.28 and 348,215.84

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Solution

The fourth proportional to 620,145.80, 855,790.28 and 348,215.84 is: 480,531.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,145.80 : 855,790.28 = 348,215.84 : x
  2. Step 2: Convert to fraction form
    620,145.80/855,790.28 = 348,215.84/x
  3. Step 3: Cross multiply
    620,145.80x = 855,790.28 × 348,215.84
  4. Step 4: Simplify right side
    620,145.80x = 297,999,731,214.04
  5. Step 5: Solve for x
    x = 297,999,731,214.04/620,145.80
  6. Step 6: Final answer
    x = 480,531.73

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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.