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Finding the Fourth Proportional to 354,511.71, 489,465.71 and 272,694.67

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Solution

The fourth proportional to 354,511.71, 489,465.71 and 272,694.67 is: 376,502.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,511.71 : 489,465.71 = 272,694.67 : x
  2. Step 2: Convert to fraction form
    354,511.71/489,465.71 = 272,694.67/x
  3. Step 3: Cross multiply
    354,511.71x = 489,465.71 × 272,694.67
  4. Step 4: Simplify right side
    354,511.71x = 133,474,690,264.77
  5. Step 5: Solve for x
    x = 133,474,690,264.77/354,511.71
  6. Step 6: Final answer
    x = 376,502.91

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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.