Home / 738,280.80-1,107,421.20-422,769.60

Finding the Fourth Proportional to 738,280.80, 1,107,421.20 and 422,769.60

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Solution

The fourth proportional to 738,280.80, 1,107,421.20 and 422,769.60 is: 634,154.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,280.80 : 1,107,421.20 = 422,769.60 : x
  2. Step 2: Convert to fraction form
    738,280.80/1,107,421.20 = 422,769.60/x
  3. Step 3: Cross multiply
    738,280.80x = 1,107,421.20 × 422,769.60
  4. Step 4: Simplify right side
    738,280.80x = 468,184,017,755.52
  5. Step 5: Solve for x
    x = 468,184,017,755.52/738,280.80
  6. Step 6: Final answer
    x = 634,154.40

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Double scale
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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.