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Finding the Fourth Proportional to 638,269.70, 957,404.55 and 389,437.70

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Solution

The fourth proportional to 638,269.70, 957,404.55 and 389,437.70 is: 584,156.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,269.70 : 957,404.55 = 389,437.70 : x
  2. Step 2: Convert to fraction form
    638,269.70/957,404.55 = 389,437.70/x
  3. Step 3: Cross multiply
    638,269.70x = 957,404.55 × 389,437.70
  4. Step 4: Simplify right side
    638,269.70x = 372,849,425,921.54
  5. Step 5: Solve for x
    x = 372,849,425,921.54/638,269.70
  6. Step 6: Final answer
    x = 584,156.55

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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.