Home / 766,699.89-1,148,575.86-428,715.44

Finding the Fourth Proportional to 766,699.89, 1,148,575.86 and 428,715.44

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Solution

The fourth proportional to 766,699.89, 1,148,575.86 and 428,715.44 is: 642,248.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    766,699.89 : 1,148,575.86 = 428,715.44 : x
  2. Step 2: Convert to fraction form
    766,699.89/1,148,575.86 = 428,715.44/x
  3. Step 3: Cross multiply
    766,699.89x = 1,148,575.86 × 428,715.44
  4. Step 4: Simplify right side
    766,699.89x = 492,412,199,450.40
  5. Step 5: Solve for x
    x = 492,412,199,450.40/766,699.89
  6. Step 6: Final answer
    x = 642,248.95

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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.