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Finding the Fourth Proportional to 661,434.40, 989,527.20 and 573,662.80

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Solution

The fourth proportional to 661,434.40, 989,527.20 and 573,662.80 is: 858,218.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,434.40 : 989,527.20 = 573,662.80 : x
  2. Step 2: Convert to fraction form
    661,434.40/989,527.20 = 573,662.80/x
  3. Step 3: Cross multiply
    661,434.40x = 989,527.20 × 573,662.80
  4. Step 4: Simplify right side
    661,434.40x = 567,654,944,228.16
  5. Step 5: Solve for x
    x = 567,654,944,228.16/661,434.40
  6. Step 6: Final answer
    x = 858,218.05

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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.