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Finding the Fourth Proportional to 656,340.40, 985,288.20 and 651,674.80

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Solution

The fourth proportional to 656,340.40, 985,288.20 and 651,674.80 is: 978,284.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,340.40 : 985,288.20 = 651,674.80 : x
  2. Step 2: Convert to fraction form
    656,340.40/985,288.20 = 651,674.80/x
  3. Step 3: Cross multiply
    656,340.40x = 985,288.20 × 651,674.80
  4. Step 4: Simplify right side
    656,340.40x = 642,087,490,677.36
  5. Step 5: Solve for x
    x = 642,087,490,677.36/656,340.40
  6. Step 6: Final answer
    x = 978,284.27

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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.