Home / 688,628.10-1,032,942.15-419,189.70

Finding the Fourth Proportional to 688,628.10, 1,032,942.15 and 419,189.70

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Solution

The fourth proportional to 688,628.10, 1,032,942.15 and 419,189.70 is: 628,784.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,628.10 : 1,032,942.15 = 419,189.70 : x
  2. Step 2: Convert to fraction form
    688,628.10/1,032,942.15 = 419,189.70/x
  3. Step 3: Cross multiply
    688,628.10x = 1,032,942.15 × 419,189.70
  4. Step 4: Simplify right side
    688,628.10x = 432,998,709,975.86
  5. Step 5: Solve for x
    x = 432,998,709,975.86/688,628.10
  6. Step 6: Final answer
    x = 628,784.55

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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.