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Finding the Fourth Proportional to 405,192.90, 606,987.45 and 355,329.30

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Solution

The fourth proportional to 405,192.90, 606,987.45 and 355,329.30 is: 532,290.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,192.90 : 606,987.45 = 355,329.30 : x
  2. Step 2: Convert to fraction form
    405,192.90/606,987.45 = 355,329.30/x
  3. Step 3: Cross multiply
    405,192.90x = 606,987.45 × 355,329.30
  4. Step 4: Simplify right side
    405,192.90x = 215,680,425,717.29
  5. Step 5: Solve for x
    x = 215,680,425,717.29/405,192.90
  6. Step 6: Final answer
    x = 532,290.73

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1.5x scale

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.