Home / 643,258.43-963,669.75-429,381.44

Finding the Fourth Proportional to 643,258.43, 963,669.75 and 429,381.44

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Solution

The fourth proportional to 643,258.43, 963,669.75 and 429,381.44 is: 643,259.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,258.43 : 963,669.75 = 429,381.44 : x
  2. Step 2: Convert to fraction form
    643,258.43/963,669.75 = 429,381.44/x
  3. Step 3: Cross multiply
    643,258.43x = 963,669.75 × 429,381.44
  4. Step 4: Simplify right side
    643,258.43x = 413,781,907,479.75
  5. Step 5: Solve for x
    x = 413,781,907,479.75/643,258.43
  6. Step 6: Final answer
    x = 643,259.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.