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Finding the Fourth Proportional to 661,812.80, 992,719.20 and 476,571.20

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Solution

The fourth proportional to 661,812.80, 992,719.20 and 476,571.20 is: 714,856.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,812.80 : 992,719.20 = 476,571.20 : x
  2. Step 2: Convert to fraction form
    661,812.80/992,719.20 = 476,571.20/x
  3. Step 3: Cross multiply
    661,812.80x = 992,719.20 × 476,571.20
  4. Step 4: Simplify right side
    661,812.80x = 473,101,380,407.04
  5. Step 5: Solve for x
    x = 473,101,380,407.04/661,812.80
  6. Step 6: Final answer
    x = 714,856.80

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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.