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Finding the Fourth Proportional to 698,909.04, 964,573.88 and 388,842.31

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Solution

The fourth proportional to 698,909.04, 964,573.88 and 388,842.31 is: 536,646.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,909.04 : 964,573.88 = 388,842.31 : x
  2. Step 2: Convert to fraction form
    698,909.04/964,573.88 = 388,842.31/x
  3. Step 3: Cross multiply
    698,909.04x = 964,573.88 × 388,842.31
  4. Step 4: Simplify right side
    698,909.04x = 375,067,135,664.86
  5. Step 5: Solve for x
    x = 375,067,135,664.86/698,909.04
  6. Step 6: Final answer
    x = 536,646.57

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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.