Home / 1,021,428.20-1,528,205.70-667,134.20

Finding the Fourth Proportional to 1,021,428.20, 1,528,205.70 and 667,134.20

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Solution

The fourth proportional to 1,021,428.20, 1,528,205.70 and 667,134.20 is: 998,130.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021,428.20 : 1,528,205.70 = 667,134.20 : x
  2. Step 2: Convert to fraction form
    1,021,428.20/1,528,205.70 = 667,134.20/x
  3. Step 3: Cross multiply
    1,021,428.20x = 1,528,205.70 × 667,134.20
  4. Step 4: Simplify right side
    1,021,428.20x = 1,019,518,287,104.94
  5. Step 5: Solve for x
    x = 1,019,518,287,104.94/1,021,428.20
  6. Step 6: Final answer
    x = 998,130.15

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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.