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Finding the Fourth Proportional to 479,779.64, 661,856.76 and 286,050.72

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Solution

The fourth proportional to 479,779.64, 661,856.76 and 286,050.72 is: 394,607.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,779.64 : 661,856.76 = 286,050.72 : x
  2. Step 2: Convert to fraction form
    479,779.64/661,856.76 = 286,050.72/x
  3. Step 3: Cross multiply
    479,779.64x = 661,856.76 × 286,050.72
  4. Step 4: Simplify right side
    479,779.64x = 189,324,602,734.87
  5. Step 5: Solve for x
    x = 189,324,602,734.87/479,779.64
  6. Step 6: Final answer
    x = 394,607.41

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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.