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Finding the Fourth Proportional to 643,182.53, 887,646.40 and 356,794.88

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Solution

The fourth proportional to 643,182.53, 887,646.40 and 356,794.88 is: 492,407.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,182.53 : 887,646.40 = 356,794.88 : x
  2. Step 2: Convert to fraction form
    643,182.53/887,646.40 = 356,794.88/x
  3. Step 3: Cross multiply
    643,182.53x = 887,646.40 × 356,794.88
  4. Step 4: Simplify right side
    643,182.53x = 316,707,685,440.21
  5. Step 5: Solve for x
    x = 316,707,685,440.21/643,182.53
  6. Step 6: Final answer
    x = 492,407.17

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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.