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Finding the Fourth Proportional to 492,661.16, 679,892.57 and 311,306.92

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Solution

The fourth proportional to 492,661.16, 679,892.57 and 311,306.92 is: 429,616.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,661.16 : 679,892.57 = 311,306.92 : x
  2. Step 2: Convert to fraction form
    492,661.16/679,892.57 = 311,306.92/x
  3. Step 3: Cross multiply
    492,661.16x = 679,892.57 × 311,306.92
  4. Step 4: Simplify right side
    492,661.16x = 211,655,259,808.72
  5. Step 5: Solve for x
    x = 211,655,259,808.72/492,661.16
  6. Step 6: Final answer
    x = 429,616.29

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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.