Home / 643,257.45-887,552.64-371,308.05

Finding the Fourth Proportional to 643,257.45, 887,552.64 and 371,308.05

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Solution

The fourth proportional to 643,257.45, 887,552.64 and 371,308.05 is: 512,322.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,257.45 : 887,552.64 = 371,308.05 : x
  2. Step 2: Convert to fraction form
    643,257.45/887,552.64 = 371,308.05/x
  3. Step 3: Cross multiply
    643,257.45x = 887,552.64 × 371,308.05
  4. Step 4: Simplify right side
    643,257.45x = 329,555,440,030.75
  5. Step 5: Solve for x
    x = 329,555,440,030.75/643,257.45
  6. Step 6: Final answer
    x = 512,322.77

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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.