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Finding the Fourth Proportional to 682,813.43, 942,141.86 and 392,368.89

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Solution

The fourth proportional to 682,813.43, 942,141.86 and 392,368.89 is: 541,388.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    682,813.43 : 942,141.86 = 392,368.89 : x
  2. Step 2: Convert to fraction form
    682,813.43/942,141.86 = 392,368.89/x
  3. Step 3: Cross multiply
    682,813.43x = 942,141.86 × 392,368.89
  4. Step 4: Simplify right side
    682,813.43x = 369,667,155,830.74
  5. Step 5: Solve for x
    x = 369,667,155,830.74/682,813.43
  6. Step 6: Final answer
    x = 541,388.23

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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.