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Finding the Fourth Proportional to 661,433.40, 989,525.70 and 573,661.80

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Solution

The fourth proportional to 661,433.40, 989,525.70 and 573,661.80 is: 858,216.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,433.40 : 989,525.70 = 573,661.80 : x
  2. Step 2: Convert to fraction form
    661,433.40/989,525.70 = 573,661.80/x
  3. Step 3: Cross multiply
    661,433.40x = 989,525.70 × 573,661.80
  4. Step 4: Simplify right side
    661,433.40x = 567,653,094,208.26
  5. Step 5: Solve for x
    x = 567,653,094,208.26/661,433.40
  6. Step 6: Final answer
    x = 858,216.56

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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.