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Finding the Fourth Proportional to 479,430.64, 661,628.20 and 261,653.30

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Solution

The fourth proportional to 479,430.64, 661,628.20 and 261,653.30 is: 361,089.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,430.64 : 661,628.20 = 261,653.30 : x
  2. Step 2: Convert to fraction form
    479,430.64/661,628.20 = 261,653.30/x
  3. Step 3: Cross multiply
    479,430.64x = 661,628.20 × 261,653.30
  4. Step 4: Simplify right side
    479,430.64x = 173,117,201,903.06
  5. Step 5: Solve for x
    x = 173,117,201,903.06/479,430.64
  6. Step 6: Final answer
    x = 361,089.15

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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.