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Finding the Fourth Proportional to 661,728.90, 989,968.95 and 573,957.30

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Solution

The fourth proportional to 661,728.90, 989,968.95 and 573,957.30 is: 858,659.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,728.90 : 989,968.95 = 573,957.30 : x
  2. Step 2: Convert to fraction form
    661,728.90/989,968.95 = 573,957.30/x
  3. Step 3: Cross multiply
    661,728.90x = 989,968.95 × 573,957.30
  4. Step 4: Simplify right side
    661,728.90x = 568,199,905,625.84
  5. Step 5: Solve for x
    x = 568,199,905,625.84/661,728.90
  6. Step 6: Final answer
    x = 858,659.65

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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.