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Finding the Fourth Proportional to 655,680.21, 904,903.47 and 383,731.89

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Solution

The fourth proportional to 655,680.21, 904,903.47 and 383,731.89 is: 529,587.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,680.21 : 904,903.47 = 383,731.89 : x
  2. Step 2: Convert to fraction form
    655,680.21/904,903.47 = 383,731.89/x
  3. Step 3: Cross multiply
    655,680.21x = 904,903.47 × 383,731.89
  4. Step 4: Simplify right side
    655,680.21x = 347,240,318,810.66
  5. Step 5: Solve for x
    x = 347,240,318,810.66/655,680.21
  6. Step 6: Final answer
    x = 529,587.92

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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.