Home / 289,420.12-434,278.26-137,788.63

Finding the Fourth Proportional to 289,420.12, 434,278.26 and 137,788.63

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Solution

The fourth proportional to 289,420.12, 434,278.26 and 137,788.63 is: 206,753.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,420.12 : 434,278.26 = 137,788.63 : x
  2. Step 2: Convert to fraction form
    289,420.12/434,278.26 = 137,788.63/x
  3. Step 3: Cross multiply
    289,420.12x = 434,278.26 × 137,788.63
  4. Step 4: Simplify right side
    289,420.12x = 59,838,605,398.49
  5. Step 5: Solve for x
    x = 59,838,605,398.49/289,420.12
  6. Step 6: Final answer
    x = 206,753.44

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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.