Home / 1,242,132.45-1,861,869.86-642,489.93

Finding the Fourth Proportional to 1,242,132.45, 1,861,869.86 and 642,489.93

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Solution

The fourth proportional to 1,242,132.45, 1,861,869.86 and 642,489.93 is: 963,047.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242,132.45 : 1,861,869.86 = 642,489.93 : x
  2. Step 2: Convert to fraction form
    1,242,132.45/1,861,869.86 = 642,489.93/x
  3. Step 3: Cross multiply
    1,242,132.45x = 1,861,869.86 × 642,489.93
  4. Step 4: Simplify right side
    1,242,132.45x = 1,196,232,632,808.06
  5. Step 5: Solve for x
    x = 1,196,232,632,808.06/1,242,132.45
  6. Step 6: Final answer
    x = 963,047.57

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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.