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Finding the Fourth Proportional to 643,449.92, 887,960.85 and 356,972.04

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Solution

The fourth proportional to 643,449.92, 887,960.85 and 356,972.04 is: 492,621.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,449.92 : 887,960.85 = 356,972.04 : x
  2. Step 2: Convert to fraction form
    643,449.92/887,960.85 = 356,972.04/x
  3. Step 3: Cross multiply
    643,449.92x = 887,960.85 × 356,972.04
  4. Step 4: Simplify right side
    643,449.92x = 316,977,196,064.63
  5. Step 5: Solve for x
    x = 316,977,196,064.63/643,449.92
  6. Step 6: Final answer
    x = 492,621.40

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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.