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Finding the Fourth Proportional to 425,389.67, 637,620.28 and 209,397.05

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Solution

The fourth proportional to 425,389.67, 637,620.28 and 209,397.05 is: 313,867.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,389.67 : 637,620.28 = 209,397.05 : x
  2. Step 2: Convert to fraction form
    425,389.67/637,620.28 = 209,397.05/x
  3. Step 3: Cross multiply
    425,389.67x = 637,620.28 × 209,397.05
  4. Step 4: Simplify right side
    425,389.67x = 133,515,804,258.04
  5. Step 5: Solve for x
    x = 133,515,804,258.04/425,389.67
  6. Step 6: Final answer
    x = 313,867.06

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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.