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Finding the Fourth Proportional to 709,742.88, 979,446.84 and 387,453.12

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Solution

The fourth proportional to 709,742.88, 979,446.84 and 387,453.12 is: 534,686.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,742.88 : 979,446.84 = 387,453.12 : x
  2. Step 2: Convert to fraction form
    709,742.88/979,446.84 = 387,453.12/x
  3. Step 3: Cross multiply
    709,742.88x = 979,446.84 × 387,453.12
  4. Step 4: Simplify right side
    709,742.88x = 379,489,734,032.14
  5. Step 5: Solve for x
    x = 379,489,734,032.14/709,742.88
  6. Step 6: Final answer
    x = 534,686.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.