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Finding the Fourth Proportional to 282,337.36, 389,626.32 and 155,021.20

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Solution

The fourth proportional to 282,337.36, 389,626.32 and 155,021.20 is: 213,929.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,337.36 : 389,626.32 = 155,021.20 : x
  2. Step 2: Convert to fraction form
    282,337.36/389,626.32 = 155,021.20/x
  3. Step 3: Cross multiply
    282,337.36x = 389,626.32 × 155,021.20
  4. Step 4: Simplify right side
    282,337.36x = 60,400,339,677.98
  5. Step 5: Solve for x
    x = 60,400,339,677.98/282,337.36
  6. Step 6: Final answer
    x = 213,929.68

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1.5x scale

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.