Home / 643,278.51-887,830.61-356,890.86

Finding the Fourth Proportional to 643,278.51, 887,830.61 and 356,890.86

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Solution

The fourth proportional to 643,278.51, 887,830.61 and 356,890.86 is: 492,568.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,278.51 : 887,830.61 = 356,890.86 : x
  2. Step 2: Convert to fraction form
    643,278.51/887,830.61 = 356,890.86/x
  3. Step 3: Cross multiply
    643,278.51x = 887,830.61 × 356,890.86
  4. Step 4: Simplify right side
    643,278.51x = 316,858,628,152.77
  5. Step 5: Solve for x
    x = 316,858,628,152.77/643,278.51
  6. Step 6: Final answer
    x = 492,568.34

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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.