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Finding the Fourth Proportional to 620,814.16, 856,719.07 and 348,876.19

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Solution

The fourth proportional to 620,814.16, 856,719.07 and 348,876.19 is: 481,446.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,814.16 : 856,719.07 = 348,876.19 : x
  2. Step 2: Convert to fraction form
    620,814.16/856,719.07 = 348,876.19/x
  3. Step 3: Cross multiply
    620,814.16x = 856,719.07 × 348,876.19
  4. Step 4: Simplify right side
    620,814.16x = 298,888,885,041.94
  5. Step 5: Solve for x
    x = 298,888,885,041.94/620,814.16
  6. Step 6: Final answer
    x = 481,446.63

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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.