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Finding the Fourth Proportional to 655,630.64, 904,609.28 and 400,888.88

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Solution

The fourth proportional to 655,630.64, 904,609.28 and 400,888.88 is: 553,128.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,630.64 : 904,609.28 = 400,888.88 : x
  2. Step 2: Convert to fraction form
    655,630.64/904,609.28 = 400,888.88/x
  3. Step 3: Cross multiply
    655,630.64x = 904,609.28 × 400,888.88
  4. Step 4: Simplify right side
    655,630.64x = 362,647,801,096.81
  5. Step 5: Solve for x
    x = 362,647,801,096.81/655,630.64
  6. Step 6: Final answer
    x = 553,128.21

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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.