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Finding the Fourth Proportional to 765,603.64, 1,056,567.68 and 443,327.80

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Solution

The fourth proportional to 765,603.64, 1,056,567.68 and 443,327.80 is: 611,812.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,603.64 : 1,056,567.68 = 443,327.80 : x
  2. Step 2: Convert to fraction form
    765,603.64/1,056,567.68 = 443,327.80/x
  3. Step 3: Cross multiply
    765,603.64x = 1,056,567.68 × 443,327.80
  4. Step 4: Simplify right side
    765,603.64x = 468,405,825,125.50
  5. Step 5: Solve for x
    x = 468,405,825,125.50/765,603.64
  6. Step 6: Final answer
    x = 611,812.43

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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.