Home / 709,777.18-979,507.38-387,500.86

Finding the Fourth Proportional to 709,777.18, 979,507.38 and 387,500.86

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Solution

The fourth proportional to 709,777.18, 979,507.38 and 387,500.86 is: 534,759.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,777.18 : 979,507.38 = 387,500.86 : x
  2. Step 2: Convert to fraction form
    709,777.18/979,507.38 = 387,500.86/x
  3. Step 3: Cross multiply
    709,777.18x = 979,507.38 × 387,500.86
  4. Step 4: Simplify right side
    709,777.18x = 379,559,954,803.86
  5. Step 5: Solve for x
    x = 379,559,954,803.86/709,777.18
  6. Step 6: Final answer
    x = 534,759.31

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Double scale
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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.