Home / 689,780.45-951,928.13-387,974.45

Finding the Fourth Proportional to 689,780.45, 951,928.13 and 387,974.45

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Solution

The fourth proportional to 689,780.45, 951,928.13 and 387,974.45 is: 535,422.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,780.45 : 951,928.13 = 387,974.45 : x
  2. Step 2: Convert to fraction form
    689,780.45/951,928.13 = 387,974.45/x
  3. Step 3: Cross multiply
    689,780.45x = 951,928.13 × 387,974.45
  4. Step 4: Simplify right side
    689,780.45x = 369,323,792,676.28
  5. Step 5: Solve for x
    x = 369,323,792,676.28/689,780.45
  6. Step 6: Final answer
    x = 535,422.24

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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.