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Finding the Fourth Proportional to 643,807.04, 888,496.12 and 371,886.38

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Solution

The fourth proportional to 643,807.04, 888,496.12 and 371,886.38 is: 513,227.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,807.04 : 888,496.12 = 371,886.38 : x
  2. Step 2: Convert to fraction form
    643,807.04/888,496.12 = 371,886.38/x
  3. Step 3: Cross multiply
    643,807.04x = 888,496.12 × 371,886.38
  4. Step 4: Simplify right side
    643,807.04x = 330,419,605,710.85
  5. Step 5: Solve for x
    x = 330,419,605,710.85/643,807.04
  6. Step 6: Final answer
    x = 513,227.70

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Double scale
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Similar ratio
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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.