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Finding the Fourth Proportional to 486,138.60, 670,601.70 and 284,895.72

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Solution

The fourth proportional to 486,138.60, 670,601.70 and 284,895.72 is: 392,998.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,138.60 : 670,601.70 = 284,895.72 : x
  2. Step 2: Convert to fraction form
    486,138.60/670,601.70 = 284,895.72/x
  3. Step 3: Cross multiply
    486,138.60x = 670,601.70 × 284,895.72
  4. Step 4: Simplify right side
    486,138.60x = 191,051,554,154.72
  5. Step 5: Solve for x
    x = 191,051,554,154.72/486,138.60
  6. Step 6: Final answer
    x = 392,998.12

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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.