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Finding the Fourth Proportional to 661,647.40, 989,846.70 and 573,875.80

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Solution

The fourth proportional to 661,647.40, 989,846.70 and 573,875.80 is: 858,537.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,647.40 : 989,846.70 = 573,875.80 : x
  2. Step 2: Convert to fraction form
    661,647.40/989,846.70 = 573,875.80/x
  3. Step 3: Cross multiply
    661,647.40x = 989,846.70 × 573,875.80
  4. Step 4: Simplify right side
    661,647.40x = 568,049,066,839.86
  5. Step 5: Solve for x
    x = 568,049,066,839.86/661,647.40
  6. Step 6: Final answer
    x = 858,537.44

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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.