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Finding the Fourth Proportional to 355,547.88, 490,638.87 and 202,621.91

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Solution

The fourth proportional to 355,547.88, 490,638.87 and 202,621.91 is: 279,608.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,547.88 : 490,638.87 = 202,621.91 : x
  2. Step 2: Convert to fraction form
    355,547.88/490,638.87 = 202,621.91/x
  3. Step 3: Cross multiply
    355,547.88x = 490,638.87 × 202,621.91
  4. Step 4: Simplify right side
    355,547.88x = 99,414,182,506.45
  5. Step 5: Solve for x
    x = 99,414,182,506.45/355,547.88
  6. Step 6: Final answer
    x = 279,608.42

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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.