Home / 689,778.45-951,925.37-387,972.45

Finding the Fourth Proportional to 689,778.45, 951,925.37 and 387,972.45

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Solution

The fourth proportional to 689,778.45, 951,925.37 and 387,972.45 is: 535,419.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,778.45 : 951,925.37 = 387,972.45 : x
  2. Step 2: Convert to fraction form
    689,778.45/951,925.37 = 387,972.45/x
  3. Step 3: Cross multiply
    689,778.45x = 951,925.37 × 387,972.45
  4. Step 4: Simplify right side
    689,778.45x = 369,320,816,076.19
  5. Step 5: Solve for x
    x = 369,320,816,076.19/689,778.45
  6. Step 6: Final answer
    x = 535,419.48

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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.