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Finding the Fourth Proportional to 425,403.54, 637,888.28 and 140,992.84

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Solution

The fourth proportional to 425,403.54, 637,888.28 and 140,992.84 is: 211,417.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,403.54 : 637,888.28 = 140,992.84 : x
  2. Step 2: Convert to fraction form
    425,403.54/637,888.28 = 140,992.84/x
  3. Step 3: Cross multiply
    425,403.54x = 637,888.28 × 140,992.84
  4. Step 4: Simplify right side
    425,403.54x = 89,937,680,199.92
  5. Step 5: Solve for x
    x = 89,937,680,199.92/425,403.54
  6. Step 6: Final answer
    x = 211,417.33

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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.