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Finding the Fourth Proportional to 978,279.12, 1,463,739.48 and 579,107.76

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Solution

The fourth proportional to 978,279.12, 1,463,739.48 and 579,107.76 is: 866,483.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,279.12 : 1,463,739.48 = 579,107.76 : x
  2. Step 2: Convert to fraction form
    978,279.12/1,463,739.48 = 579,107.76/x
  3. Step 3: Cross multiply
    978,279.12x = 1,463,739.48 × 579,107.76
  4. Step 4: Simplify right side
    978,279.12x = 847,662,891,486.37
  5. Step 5: Solve for x
    x = 847,662,891,486.37/978,279.12
  6. Step 6: Final answer
    x = 866,483.68

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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.