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Finding the Fourth Proportional to 354,472.95, 489,153.45 and 201,489.91

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Solution

The fourth proportional to 354,472.95, 489,153.45 and 201,489.91 is: 278,045.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,472.95 : 489,153.45 = 201,489.91 : x
  2. Step 2: Convert to fraction form
    354,472.95/489,153.45 = 201,489.91/x
  3. Step 3: Cross multiply
    354,472.95x = 489,153.45 × 201,489.91
  4. Step 4: Simplify right side
    354,472.95x = 98,559,484,616.69
  5. Step 5: Solve for x
    x = 98,559,484,616.69/354,472.95
  6. Step 6: Final answer
    x = 278,045.15

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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.