Home / 643,369.90-887,778.84-356,818.18

Finding the Fourth Proportional to 643,369.90, 887,778.84 and 356,818.18

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Solution

The fourth proportional to 643,369.90, 887,778.84 and 356,818.18 is: 492,369.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,369.90 : 887,778.84 = 356,818.18 : x
  2. Step 2: Convert to fraction form
    643,369.90/887,778.84 = 356,818.18/x
  3. Step 3: Cross multiply
    643,369.90x = 887,778.84 × 356,818.18
  4. Step 4: Simplify right side
    643,369.90x = 316,775,629,931.31
  5. Step 5: Solve for x
    x = 316,775,629,931.31/643,369.90
  6. Step 6: Final answer
    x = 492,369.37

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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.