Home / 1,278,478.89-1,916,370.12-425,322

Finding the Fourth Proportional to 1,278,478.89, 1,916,370.12 and 425,322

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Solution

The fourth proportional to 1,278,478.89, 1,916,370.12 and 425,322 is: 637,534.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,478.89 : 1,916,370.12 = 425,322 : x
  2. Step 2: Convert to fraction form
    1,278,478.89/1,916,370.12 = 425,322/x
  3. Step 3: Cross multiply
    1,278,478.89x = 1,916,370.12 × 425,322
  4. Step 4: Simplify right side
    1,278,478.89x = 815,074,372,178.64
  5. Step 5: Solve for x
    x = 815,074,372,178.64/1,278,478.89
  6. Step 6: Final answer
    x = 637,534.48

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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.