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Finding the Fourth Proportional to 408,801.90, 613,312.20 and 290,703.90

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Solution

The fourth proportional to 408,801.90, 613,312.20 and 290,703.90 is: 436,133.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,801.90 : 613,312.20 = 290,703.90 : x
  2. Step 2: Convert to fraction form
    408,801.90/613,312.20 = 290,703.90/x
  3. Step 3: Cross multiply
    408,801.90x = 613,312.20 × 290,703.90
  4. Step 4: Simplify right side
    408,801.90x = 178,292,248,457.58
  5. Step 5: Solve for x
    x = 178,292,248,457.58/408,801.90
  6. Step 6: Final answer
    x = 436,133.61

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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.