Home / 1,242,128.17-1,861,863.45-642,485.62

Finding the Fourth Proportional to 1,242,128.17, 1,861,863.45 and 642,485.62

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Solution

The fourth proportional to 1,242,128.17, 1,861,863.45 and 642,485.62 is: 963,041.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242,128.17 : 1,861,863.45 = 642,485.62 : x
  2. Step 2: Convert to fraction form
    1,242,128.17/1,861,863.45 = 642,485.62/x
  3. Step 3: Cross multiply
    1,242,128.17x = 1,861,863.45 × 642,485.62
  4. Step 4: Simplify right side
    1,242,128.17x = 1,196,220,493,028.59
  5. Step 5: Solve for x
    x = 1,196,220,493,028.59/1,242,128.17
  6. Step 6: Final answer
    x = 963,041.11

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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.