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Finding the Fourth Proportional to 405,184.40, 606,974.70 and 355,320.80

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Solution

The fourth proportional to 405,184.40, 606,974.70 and 355,320.80 is: 532,277.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,184.40 : 606,974.70 = 355,320.80 : x
  2. Step 2: Convert to fraction form
    405,184.40/606,974.70 = 355,320.80/x
  3. Step 3: Cross multiply
    405,184.40x = 606,974.70 × 355,320.80
  4. Step 4: Simplify right side
    405,184.40x = 215,670,735,983.76
  5. Step 5: Solve for x
    x = 215,670,735,983.76/405,184.40
  6. Step 6: Final answer
    x = 532,277.98

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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.