Home / 1,278,478.40-1,916,369.52-425,322.20

Finding the Fourth Proportional to 1,278,478.40, 1,916,369.52 and 425,322.20

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Solution

The fourth proportional to 1,278,478.40, 1,916,369.52 and 425,322.20 is: 637,534.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,478.40 : 1,916,369.52 = 425,322.20 : x
  2. Step 2: Convert to fraction form
    1,278,478.40/1,916,369.52 = 425,322.20/x
  3. Step 3: Cross multiply
    1,278,478.40x = 1,916,369.52 × 425,322.20
  4. Step 4: Simplify right side
    1,278,478.40x = 815,074,500,259.34
  5. Step 5: Solve for x
    x = 815,074,500,259.34/1,278,478.40
  6. Step 6: Final answer
    x = 637,534.82

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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.