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Finding the Fourth Proportional to 423,074.80, 634,612.20 and 404,412.40

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Solution

The fourth proportional to 423,074.80, 634,612.20 and 404,412.40 is: 606,618.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,074.80 : 634,612.20 = 404,412.40 : x
  2. Step 2: Convert to fraction form
    423,074.80/634,612.20 = 404,412.40/x
  3. Step 3: Cross multiply
    423,074.80x = 634,612.20 × 404,412.40
  4. Step 4: Simplify right side
    423,074.80x = 256,645,042,871.28
  5. Step 5: Solve for x
    x = 256,645,042,871.28/423,074.80
  6. Step 6: Final answer
    x = 606,618.60

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Similar ratio
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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.