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Finding the Fourth Proportional to 290,628.98, 436,006.76 and 122,053.20

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Solution

The fourth proportional to 290,628.98, 436,006.76 and 122,053.20 is: 183,106.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,628.98 : 436,006.76 = 122,053.20 : x
  2. Step 2: Convert to fraction form
    290,628.98/436,006.76 = 122,053.20/x
  3. Step 3: Cross multiply
    290,628.98x = 436,006.76 × 122,053.20
  4. Step 4: Simplify right side
    290,628.98x = 53,216,020,279.63
  5. Step 5: Solve for x
    x = 53,216,020,279.63/290,628.98
  6. Step 6: Final answer
    x = 183,106.38

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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.