Home / 1,278,005.60-1,916,279.40-479,313.20

Finding the Fourth Proportional to 1,278,005.60, 1,916,279.40 and 479,313.20

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Solution

The fourth proportional to 1,278,005.60, 1,916,279.40 and 479,313.20 is: 718,696.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,005.60 : 1,916,279.40 = 479,313.20 : x
  2. Step 2: Convert to fraction form
    1,278,005.60/1,916,279.40 = 479,313.20/x
  3. Step 3: Cross multiply
    1,278,005.60x = 1,916,279.40 × 479,313.20
  4. Step 4: Simplify right side
    1,278,005.60x = 918,498,011,308.08
  5. Step 5: Solve for x
    x = 918,498,011,308.08/1,278,005.60
  6. Step 6: Final answer
    x = 718,696.39

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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.