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Finding the Fourth Proportional to 647,999.60, 971,999.40 and 545,356.40

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Solution

The fourth proportional to 647,999.60, 971,999.40 and 545,356.40 is: 818,034.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,999.60 : 971,999.40 = 545,356.40 : x
  2. Step 2: Convert to fraction form
    647,999.60/971,999.40 = 545,356.40/x
  3. Step 3: Cross multiply
    647,999.60x = 971,999.40 × 545,356.40
  4. Step 4: Simplify right side
    647,999.60x = 530,086,093,586.16
  5. Step 5: Solve for x
    x = 530,086,093,586.16/647,999.60
  6. Step 6: Final answer
    x = 818,034.60

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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.