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Finding the Fourth Proportional to 620,808.27, 856,721.04 and 375,798.66

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Solution

The fourth proportional to 620,808.27, 856,721.04 and 375,798.66 is: 518,605.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,808.27 : 856,721.04 = 375,798.66 : x
  2. Step 2: Convert to fraction form
    620,808.27/856,721.04 = 375,798.66/x
  3. Step 3: Cross multiply
    620,808.27x = 856,721.04 × 375,798.66
  4. Step 4: Simplify right side
    620,808.27x = 321,954,618,825.81
  5. Step 5: Solve for x
    x = 321,954,618,825.81/620,808.27
  6. Step 6: Final answer
    x = 518,605.56

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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.