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Finding the Fourth Proportional to 402,424.45, 554,790.82 and 321,029.01

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Solution

The fourth proportional to 402,424.45, 554,790.82 and 321,029.01 is: 442,577.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,424.45 : 554,790.82 = 321,029.01 : x
  2. Step 2: Convert to fraction form
    402,424.45/554,790.82 = 321,029.01/x
  3. Step 3: Cross multiply
    402,424.45x = 554,790.82 × 321,029.01
  4. Step 4: Simplify right side
    402,424.45x = 178,103,947,701.69
  5. Step 5: Solve for x
    x = 178,103,947,701.69/402,424.45
  6. Step 6: Final answer
    x = 442,577.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.