Home / 689,777.20-951,923.64-387,971.20

Finding the Fourth Proportional to 689,777.20, 951,923.64 and 387,971.20

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Solution

The fourth proportional to 689,777.20, 951,923.64 and 387,971.20 is: 535,417.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,777.20 : 951,923.64 = 387,971.20 : x
  2. Step 2: Convert to fraction form
    689,777.20/951,923.64 = 387,971.20/x
  3. Step 3: Cross multiply
    689,777.20x = 951,923.64 × 387,971.20
  4. Step 4: Simplify right side
    689,777.20x = 369,318,956,919.17
  5. Step 5: Solve for x
    x = 369,318,956,919.17/689,777.20
  6. Step 6: Final answer
    x = 535,417.75

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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.