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Finding the Fourth Proportional to 636,400.80, 878,169.60 and 364,532.40

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Solution

The fourth proportional to 636,400.80, 878,169.60 and 364,532.40 is: 503,018.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,400.80 : 878,169.60 = 364,532.40 : x
  2. Step 2: Convert to fraction form
    636,400.80/878,169.60 = 364,532.40/x
  3. Step 3: Cross multiply
    636,400.80x = 878,169.60 × 364,532.40
  4. Step 4: Simplify right side
    636,400.80x = 320,121,271,895.04
  5. Step 5: Solve for x
    x = 320,121,271,895.04/636,400.80
  6. Step 6: Final answer
    x = 503,018.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.