Home / 1,139,694.80-1,709,542.20-666,136.40

Finding the Fourth Proportional to 1,139,694.80, 1,709,542.20 and 666,136.40

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Solution

The fourth proportional to 1,139,694.80, 1,709,542.20 and 666,136.40 is: 999,204.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139,694.80 : 1,709,542.20 = 666,136.40 : x
  2. Step 2: Convert to fraction form
    1,139,694.80/1,709,542.20 = 666,136.40/x
  3. Step 3: Cross multiply
    1,139,694.80x = 1,709,542.20 × 666,136.40
  4. Step 4: Simplify right side
    1,139,694.80x = 1,138,788,286,756.08
  5. Step 5: Solve for x
    x = 1,138,788,286,756.08/1,139,694.80
  6. Step 6: Final answer
    x = 999,204.60

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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.