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Finding the Fourth Proportional to 655,387.78, 903,969.33 and 437,486.65

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Solution

The fourth proportional to 655,387.78, 903,969.33 and 437,486.65 is: 603,420.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,387.78 : 903,969.33 = 437,486.65 : x
  2. Step 2: Convert to fraction form
    655,387.78/903,969.33 = 437,486.65/x
  3. Step 3: Cross multiply
    655,387.78x = 903,969.33 × 437,486.65
  4. Step 4: Simplify right side
    655,387.78x = 395,474,513,884.45
  5. Step 5: Solve for x
    x = 395,474,513,884.45/655,387.78
  6. Step 6: Final answer
    x = 603,420.64

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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.