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Finding the Fourth Proportional to 421,280.13, 581,224.64 and 239,863.73

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Solution

The fourth proportional to 421,280.13, 581,224.64 and 239,863.73 is: 330,931.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,280.13 : 581,224.64 = 239,863.73 : x
  2. Step 2: Convert to fraction form
    421,280.13/581,224.64 = 239,863.73/x
  3. Step 3: Cross multiply
    421,280.13x = 581,224.64 × 239,863.73
  4. Step 4: Simplify right side
    421,280.13x = 139,414,706,012.87
  5. Step 5: Solve for x
    x = 139,414,706,012.87/421,280.13
  6. Step 6: Final answer
    x = 330,931.12

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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.