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Finding the Fourth Proportional to 821,901.60, 1,232,074.80 and 485,200.80

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Solution

The fourth proportional to 821,901.60, 1,232,074.80 and 485,200.80 is: 727,342.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,901.60 : 1,232,074.80 = 485,200.80 : x
  2. Step 2: Convert to fraction form
    821,901.60/1,232,074.80 = 485,200.80/x
  3. Step 3: Cross multiply
    821,901.60x = 1,232,074.80 × 485,200.80
  4. Step 4: Simplify right side
    821,901.60x = 597,803,678,619.84
  5. Step 5: Solve for x
    x = 597,803,678,619.84/821,901.60
  6. Step 6: Final answer
    x = 727,342.15

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1.5x scale

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.