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Finding the Fourth Proportional to 479,453.32, 661,706.58 and 288,569.80

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Solution

The fourth proportional to 479,453.32, 661,706.58 and 288,569.80 is: 398,263.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,453.32 : 661,706.58 = 288,569.80 : x
  2. Step 2: Convert to fraction form
    479,453.32/661,706.58 = 288,569.80/x
  3. Step 3: Cross multiply
    479,453.32x = 661,706.58 × 288,569.80
  4. Step 4: Simplify right side
    479,453.32x = 190,948,535,449.28
  5. Step 5: Solve for x
    x = 190,948,535,449.28/479,453.32
  6. Step 6: Final answer
    x = 398,263.04

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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.