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Finding the Fourth Proportional to 647,645.70, 971,468.55 and 605,655.30

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Solution

The fourth proportional to 647,645.70, 971,468.55 and 605,655.30 is: 908,482.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,645.70 : 971,468.55 = 605,655.30 : x
  2. Step 2: Convert to fraction form
    647,645.70/971,468.55 = 605,655.30/x
  3. Step 3: Cross multiply
    647,645.70x = 971,468.55 × 605,655.30
  4. Step 4: Simplify right side
    647,645.70x = 588,375,076,090.82
  5. Step 5: Solve for x
    x = 588,375,076,090.82/647,645.70
  6. Step 6: Final answer
    x = 908,482.95

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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.