Home / 689,728.86-951,816.69-387,922.86

Finding the Fourth Proportional to 689,728.86, 951,816.69 and 387,922.86

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Solution

The fourth proportional to 689,728.86, 951,816.69 and 387,922.86 is: 535,328.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,728.86 : 951,816.69 = 387,922.86 : x
  2. Step 2: Convert to fraction form
    689,728.86/951,816.69 = 387,922.86/x
  3. Step 3: Cross multiply
    689,728.86x = 951,816.69 × 387,922.86
  4. Step 4: Simplify right side
    689,728.86x = 369,231,452,580.53
  5. Step 5: Solve for x
    x = 369,231,452,580.53/689,728.86
  6. Step 6: Final answer
    x = 535,328.41

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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.