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Finding the Fourth Proportional to 637,899.20, 956,978.40 and 217,217.60

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Solution

The fourth proportional to 637,899.20, 956,978.40 and 217,217.60 is: 325,870.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,899.20 : 956,978.40 = 217,217.60 : x
  2. Step 2: Convert to fraction form
    637,899.20/956,978.40 = 217,217.60/x
  3. Step 3: Cross multiply
    637,899.20x = 956,978.40 × 217,217.60
  4. Step 4: Simplify right side
    637,899.20x = 207,872,551,299.84
  5. Step 5: Solve for x
    x = 207,872,551,299.84/637,899.20
  6. Step 6: Final answer
    x = 325,870.53

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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.