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Finding the Fourth Proportional to 643,646.60, 965,783.50 and 264,681.20

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Solution

The fourth proportional to 643,646.60, 965,783.50 and 264,681.20 is: 397,150.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,646.60 : 965,783.50 = 264,681.20 : x
  2. Step 2: Convert to fraction form
    643,646.60/965,783.50 = 264,681.20/x
  3. Step 3: Cross multiply
    643,646.60x = 965,783.50 × 264,681.20
  4. Step 4: Simplify right side
    643,646.60x = 255,624,735,720.20
  5. Step 5: Solve for x
    x = 255,624,735,720.20/643,646.60
  6. Step 6: Final answer
    x = 397,150.76

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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.