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Finding the Fourth Proportional to 423,078.80, 634,618.20 and 404,416.40

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Solution

The fourth proportional to 423,078.80, 634,618.20 and 404,416.40 is: 606,624.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,078.80 : 634,618.20 = 404,416.40 : x
  2. Step 2: Convert to fraction form
    423,078.80/634,618.20 = 404,416.40/x
  3. Step 3: Cross multiply
    423,078.80x = 634,618.20 × 404,416.40
  4. Step 4: Simplify right side
    423,078.80x = 256,650,007,818.48
  5. Step 5: Solve for x
    x = 256,650,007,818.48/423,078.80
  6. Step 6: Final answer
    x = 606,624.60

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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.