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Finding the Fourth Proportional to 417,561.80, 626,339.70 and 102,015.80

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Solution

The fourth proportional to 417,561.80, 626,339.70 and 102,015.80 is: 153,022.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,561.80 : 626,339.70 = 102,015.80 : x
  2. Step 2: Convert to fraction form
    417,561.80/626,339.70 = 102,015.80/x
  3. Step 3: Cross multiply
    417,561.80x = 626,339.70 × 102,015.80
  4. Step 4: Simplify right side
    417,561.80x = 63,896,545,567.26
  5. Step 5: Solve for x
    x = 63,896,545,567.26/417,561.80
  6. Step 6: Final answer
    x = 153,022.97

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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.