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Finding the Fourth Proportional to 642,589.99, 962,833.39 and 389,948.15

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Solution

The fourth proportional to 642,589.99, 962,833.39 and 389,948.15 is: 584,284.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,589.99 : 962,833.39 = 389,948.15 : x
  2. Step 2: Convert to fraction form
    642,589.99/962,833.39 = 389,948.15/x
  3. Step 3: Cross multiply
    642,589.99x = 962,833.39 × 389,948.15
  4. Step 4: Simplify right side
    642,589.99x = 375,455,099,188.73
  5. Step 5: Solve for x
    x = 375,455,099,188.73/642,589.99
  6. Step 6: Final answer
    x = 584,284.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.