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Finding the Fourth Proportional to 486,322.72, 671,122.79 and 282,423.77

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Solution

The fourth proportional to 486,322.72, 671,122.79 and 282,423.77 is: 389,743.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,322.72 : 671,122.79 = 282,423.77 : x
  2. Step 2: Convert to fraction form
    486,322.72/671,122.79 = 282,423.77/x
  3. Step 3: Cross multiply
    486,322.72x = 671,122.79 × 282,423.77
  4. Step 4: Simplify right side
    486,322.72x = 189,541,027,072.60
  5. Step 5: Solve for x
    x = 189,541,027,072.60/486,322.72
  6. Step 6: Final answer
    x = 389,743.31

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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.