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Finding the Fourth Proportional to 698,909.52, 964,574.53 and 388,842.78

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Solution

The fourth proportional to 698,909.52, 964,574.53 and 388,842.78 is: 536,647.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,909.52 : 964,574.53 = 388,842.78 : x
  2. Step 2: Convert to fraction form
    698,909.52/964,574.53 = 388,842.78/x
  3. Step 3: Cross multiply
    698,909.52x = 964,574.53 × 388,842.78
  4. Step 4: Simplify right side
    698,909.52x = 375,067,842,734.50
  5. Step 5: Solve for x
    x = 375,067,842,734.50/698,909.52
  6. Step 6: Final answer
    x = 536,647.21

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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.