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Finding the Fourth Proportional to 354,330.71, 489,443.12 and 262,635.87

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Solution

The fourth proportional to 354,330.71, 489,443.12 and 262,635.87 is: 362,783.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,330.71 : 489,443.12 = 262,635.87 : x
  2. Step 2: Convert to fraction form
    354,330.71/489,443.12 = 262,635.87/x
  3. Step 3: Cross multiply
    354,330.71x = 489,443.12 × 262,635.87
  4. Step 4: Simplify right side
    354,330.71x = 128,545,318,323.54
  5. Step 5: Solve for x
    x = 128,545,318,323.54/354,330.71
  6. Step 6: Final answer
    x = 362,783.46

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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.