Home / 1,242,123.18-1,861,855.94-642,480.62

Finding the Fourth Proportional to 1,242,123.18, 1,861,855.94 and 642,480.62

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Solution

The fourth proportional to 1,242,123.18, 1,861,855.94 and 642,480.62 is: 963,033.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242,123.18 : 1,861,855.94 = 642,480.62 : x
  2. Step 2: Convert to fraction form
    1,242,123.18/1,861,855.94 = 642,480.62/x
  3. Step 3: Cross multiply
    1,242,123.18x = 1,861,855.94 × 642,480.62
  4. Step 4: Simplify right side
    1,242,123.18x = 1,196,206,358,681.88
  5. Step 5: Solve for x
    x = 1,196,206,358,681.88/1,242,123.18
  6. Step 6: Final answer
    x = 963,033.60

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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.