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Finding the Fourth Proportional to 738,393, 1,018,982.88 and 398,861.25

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Solution

The fourth proportional to 738,393, 1,018,982.88 and 398,861.25 is: 550,428.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,393 : 1,018,982.88 = 398,861.25 : x
  2. Step 2: Convert to fraction form
    738,393/1,018,982.88 = 398,861.25/x
  3. Step 3: Cross multiply
    738,393x = 1,018,982.88 × 398,861.25
  4. Step 4: Simplify right side
    738,393x = 406,432,785,245.40
  5. Step 5: Solve for x
    x = 406,432,785,245.40/738,393
  6. Step 6: Final answer
    x = 550,428.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.