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Finding the Fourth Proportional to 643,465.40, 965,198.10 and 572,606.60

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Solution

The fourth proportional to 643,465.40, 965,198.10 and 572,606.60 is: 858,909.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,465.40 : 965,198.10 = 572,606.60 : x
  2. Step 2: Convert to fraction form
    643,465.40/965,198.10 = 572,606.60/x
  3. Step 3: Cross multiply
    643,465.40x = 965,198.10 × 572,606.60
  4. Step 4: Simplify right side
    643,465.40x = 552,678,802,367.46
  5. Step 5: Solve for x
    x = 552,678,802,367.46/643,465.40
  6. Step 6: Final answer
    x = 858,909.90

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Double scale
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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.