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Finding the Fourth Proportional to 656,321.40, 985,259.70 and 651,655.80

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Solution

The fourth proportional to 656,321.40, 985,259.70 and 651,655.80 is: 978,255.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,321.40 : 985,259.70 = 651,655.80 : x
  2. Step 2: Convert to fraction form
    656,321.40/985,259.70 = 651,655.80/x
  3. Step 3: Cross multiply
    656,321.40x = 985,259.70 × 651,655.80
  4. Step 4: Simplify right side
    656,321.40x = 642,050,198,011.26
  5. Step 5: Solve for x
    x = 642,050,198,011.26/656,321.40
  6. Step 6: Final answer
    x = 978,255.77

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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.