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Finding the Fourth Proportional to 638,303.70, 957,455.55 and 458,942.37

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Solution

The fourth proportional to 638,303.70, 957,455.55 and 458,942.37 is: 688,413.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,303.70 : 957,455.55 = 458,942.37 : x
  2. Step 2: Convert to fraction form
    638,303.70/957,455.55 = 458,942.37/x
  3. Step 3: Cross multiply
    638,303.70x = 957,455.55 × 458,942.37
  4. Step 4: Simplify right side
    638,303.70x = 439,416,914,499.38
  5. Step 5: Solve for x
    x = 439,416,914,499.38/638,303.70
  6. Step 6: Final answer
    x = 688,413.55

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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.