Home / 738,285.80-1,107,428.70-422,774.60

Finding the Fourth Proportional to 738,285.80, 1,107,428.70 and 422,774.60

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Solution

The fourth proportional to 738,285.80, 1,107,428.70 and 422,774.60 is: 634,161.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,285.80 : 1,107,428.70 = 422,774.60 : x
  2. Step 2: Convert to fraction form
    738,285.80/1,107,428.70 = 422,774.60/x
  3. Step 3: Cross multiply
    738,285.80x = 1,107,428.70 × 422,774.60
  4. Step 4: Simplify right side
    738,285.80x = 468,192,725,671.02
  5. Step 5: Solve for x
    x = 468,192,725,671.02/738,285.80
  6. Step 6: Final answer
    x = 634,161.90

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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.