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Finding the Fourth Proportional to 647,999.90, 971,999.85 and 364,564.70

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Solution

The fourth proportional to 647,999.90, 971,999.85 and 364,564.70 is: 546,847.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,999.90 : 971,999.85 = 364,564.70 : x
  2. Step 2: Convert to fraction form
    647,999.90/971,999.85 = 364,564.70/x
  3. Step 3: Cross multiply
    647,999.90x = 971,999.85 × 364,564.70
  4. Step 4: Simplify right side
    647,999.90x = 354,356,833,715.30
  5. Step 5: Solve for x
    x = 354,356,833,715.30/647,999.90
  6. Step 6: Final answer
    x = 546,847.05

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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.